Solve using the quadratic formula.8w2−3w−9=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.`w=`____ or `w=`____
Q. Solve using the quadratic formula.8w2−3w−9=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.`w=`____ or `w=`____
Identify Coefficients: Identify the coefficients of the quadratic equation8w2−3w−9=0 to use in the quadratic formula. The standard form of a quadratic equation is ax2+bx+c=0. Here, a=8, b=−3, and c=−9.
Write Quadratic Formula: Write down the quadratic formula, which is w=2a−b±b2−4ac. We will substitute the values of a, b, and c into this formula to find the solutions for w.
Substitute Values: Substitute the values of a, b, and c into the quadratic formula: w=2⋅8−(−3)±(−3)2−4⋅8⋅(−9).
Calculate Discriminant: Simplify the equation by calculating the discriminant (the part under the square root): (−3)2−4⋅8⋅(−9)=9+288=297.
Calculate Solutions: Now, calculate the two possible solutions for w using the simplified discriminant: w=163±297.
Simplify Solutions: Simplify the solutions further. Since 297 cannot be simplified to an integer or a simple fraction, we will use a calculator to find the decimal approximation: 297≈17.23.
Calculate Decimal Approximation: Calculate the two solutions for w by adding and subtracting the approximate value of 297: w≈(3+17.23)/16 or w≈(3−17.23)/16.
Perform Division: Perform the division to find the approximate decimal values: w≈1620.23 or w≈16−14.23, which gives w≈1.27 or w≈−0.89 when rounded to the nearest hundredth.
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