163 is a root of f(x)=x3+x2−768x−768. Find the other roots of f(x).Write your answer as a list of simplified values separated by commas, if there is more than one value.
Q. 163 is a root of f(x)=x3+x2−768x−768. Find the other roots of f(x).Write your answer as a list of simplified values separated by commas, if there is more than one value.
Set Up Synthetic Division: Since 163 is a root of the polynomial f(x), we can use synthetic division or polynomial division to divide f(x) by (x−163) to find the other factors of the polynomial.
Find Quadratic Factor: First, let's set up the synthetic division with 163 as the divisor and the coefficients of f(x) as the dividend: 1 (for x3), 1 (for x2), −768 (for x), and −768 (for the constant term).
Solve System of Equations: Performing the synthetic division, we bring down the leading coefficient 1 and multiply it by 163, then add this to the next coefficient 1, and continue this process. However, since this is a complex process and requires careful calculation, we will use the fact that the polynomial is of degree 3 and we already have one real root to find the other roots by factoring or using the quadratic formula.
Apply Quadratic Formula: To find the quadratic factor, we can use the fact that the sum of the roots of the polynomial, given by −b/a for a cubic polynomial ax3+bx2+cx+d, should equal the negative of the coefficient of x2 divided by the coefficient of x3. In this case, the sum of the roots is −1/1=−1.
Calculate Discriminant: Since we know one root is 163, the sum of the other two roots must be −1−163. Let's call these two roots r1 and r2. So, r1+r2=−1−163.
Find Roots: We also know that the product of the roots of the polynomial, given by −ad for a cubic polynomial ax3+bx2+cx+d, should equal the negative of the constant term divided by the coefficient of x3. In this case, the product of the roots is −(−768)/1=768.
Find Roots: We also know that the product of the roots of the polynomial, given by −d/a for a cubic polynomial ax3+bx2+cx+d, should equal the negative of the constant term divided by the coefficient of x3. In this case, the product of the roots is −(−768)/1=768.Since we know one root is 163, the product of the other two roots must be 768/(163). Let's calculate this value: 768/(163)=48/3=483/3=163.
Find Roots: We also know that the product of the roots of the polynomial, given by −ad for a cubic polynomial ax3+bx2+cx+d, should equal the negative of the constant term divided by the coefficient of x3. In this case, the product of the roots is −(−768)/1=768.Since we know one root is 163, the product of the other two roots must be 768/(163). Let's calculate this value: 768/(163)=48/3=483/3=163.Now we have a system of equations for r1 and r2:r1+r2=−1−163ax3+bx2+cx+d0We can solve this system by using the quadratic formula, where the sum of the roots is the negative coefficient of ax3+bx2+cx+d1, and the product of the roots is the constant term. The quadratic equation will be ax3+bx2+cx+d2.
Find Roots: We also know that the product of the roots of the polynomial, given by −ad for a cubic polynomial ax3+bx2+cx+d, should equal the negative of the constant term divided by the coefficient of x3. In this case, the product of the roots is −(−768)/1=768.Since we know one root is 163, the product of the other two roots must be 768/(163). Let's calculate this value: 768/(163)=48/3=483/3=163.Now we have a system of equations for r1 and r2:r1+r2=−1−163r1⋅r2=163We can solve this system by using the quadratic formula, where the sum of the roots is the negative coefficient of x, and the product of the roots is the constant term. The quadratic equation will be ax3+bx2+cx+d0.Applying the quadratic formula, ax3+bx2+cx+d1, with ax3+bx2+cx+d2, ax3+bx2+cx+d3, and ax3+bx2+cx+d4, we find the other two roots.
Find Roots: We also know that the product of the roots of the polynomial, given by −ad for a cubic polynomial ax3+bx2+cx+d, should equal the negative of the constant term divided by the coefficient of x3. In this case, the product of the roots is −(−768)/1=768.Since we know one root is 163, the product of the other two roots must be 768/(163). Let's calculate this value: 768/(163)=48/3=483/3=163.Now we have a system of equations for r1 and r2:r1+r2=−1−163r1⋅r2=163We can solve this system by using the quadratic formula, where the sum of the roots is the negative coefficient of x, and the product of the roots is the constant term. The quadratic equation will be ax3+bx2+cx+d0.Applying the quadratic formula, ax3+bx2+cx+d1, with ax3+bx2+cx+d2, ax3+bx2+cx+d3, and ax3+bx2+cx+d4, we find the other two roots.Calculating the discriminant, ax3+bx2+cx+d5.
Find Roots: We also know that the product of the roots of the polynomial, given by −ad for a cubic polynomial ax3+bx2+cx+d, should equal the negative of the constant term divided by the coefficient of x3. In this case, the product of the roots is −(−768)/1=768.Since we know one root is 163, the product of the other two roots must be 768/(163). Let's calculate this value: 768/(163)=48/3=483/3=163.Now we have a system of equations for r1 and r2:r1+r2=−1−163r1⋅r2=163We can solve this system by using the quadratic formula, where the sum of the roots is the negative coefficient of x, and the product of the roots is the constant term. The quadratic equation will be ax3+bx2+cx+d0.Applying the quadratic formula, ax3+bx2+cx+d1, with ax3+bx2+cx+d2, ax3+bx2+cx+d3, and ax3+bx2+cx+d4, we find the other two roots.Calculating the discriminant, ax3+bx2+cx+d5.Simplifying the discriminant, ax3+bx2+cx+d6.
Find Roots: We also know that the product of the roots of the polynomial, given by −ad for a cubic polynomial ax3+bx2+cx+d, should equal the negative of the constant term divided by the coefficient of x3. In this case, the product of the roots is −(−768)/1=768.Since we know one root is 163, the product of the other two roots must be 768/(163). Let's calculate this value: 768/(163)=48/3=483/3=163.Now we have a system of equations for r1 and r2:r1+r2=−1−163r1⋅r2=163We can solve this system by using the quadratic formula, where the sum of the roots is the negative coefficient of x, and the product of the roots is the constant term. The quadratic equation will be ax3+bx2+cx+d0.Applying the quadratic formula, ax3+bx2+cx+d1, with ax3+bx2+cx+d2, ax3+bx2+cx+d3, and ax3+bx2+cx+d4, we find the other two roots.Calculating the discriminant, ax3+bx2+cx+d5.Simplifying the discriminant, ax3+bx2+cx+d6.Now we can find the roots using the quadratic formula:x=2−(1+163)±769−323
Find Roots: We also know that the product of the roots of the polynomial, given by −ad for a cubic polynomial ax3+bx2+cx+d, should equal the negative of the constant term divided by the coefficient of x3. In this case, the product of the roots is −(−768)/1=768.Since we know one root is 163, the product of the other two roots must be 768/(163). Let's calculate this value: 768/(163)=48/3=483/3=163.Now we have a system of equations for r1 and r2:r1+r2=−1−163ax3+bx2+cx+d0We can solve this system by using the quadratic formula, where the sum of the roots is the negative coefficient of ax3+bx2+cx+d1, and the product of the roots is the constant term. The quadratic equation will be ax3+bx2+cx+d2.Applying the quadratic formula, ax3+bx2+cx+d3, with ax3+bx2+cx+d4, ax3+bx2+cx+d5, and ax3+bx2+cx+d6, we find the other two roots.Calculating the discriminant, ax3+bx2+cx+d7.Simplifying the discriminant, ax3+bx2+cx+d8.Now we can find the roots using the quadratic formula:ax3+bx2+cx+d9This gives us two roots, which we can simplify further. However, we made a mistake in the calculation of the discriminant. The correct calculation should be x30.