Solve using the quadratic formula.x2+x−8=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.x=_____ or x=_____
Q. Solve using the quadratic formula.x2+x−8=0Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth.x=_____ or x=_____
Identify coefficients: Identify the coefficients of the quadratic equationx2+x−8=0. The standard form of a quadratic equation is ax2+bx+c=0. Here, a=1, b=1, and c=−8.
Recall quadratic formula: Recall the quadratic formula: x=2a−b±b2−4ac. We will use this formula to find the values of x.
Substitute coefficients into formula: Substitute the coefficients a, b, and c into the quadratic formula.x=2(1)−(1)±(1)2−4(1)(−8)x=2−1±1+32x=2−1±33
Calculate discriminant: Calculate the discriminant 33 and simplify the expression.33 is an irrational number, so we will leave it under the square root.x=2−1+33 or x=2−1−33
Write final solutions: Write the final solutions.The solutions are x=2−1+33 or x=2−1−33.These cannot be simplified to integers or fractions, so we will leave them in this form.
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