Question

Identify the values of a, b, and c that would be used in the quadratic formula to solve the equation −x^2 + 5x = 7.

A. a = −1, b = 5, c = 0
B. a = 1, b = 5, c = 7
C. a = −1, b = 5, c = −7
D. a = 1, b = −5, c = 0

Answer 1

$ax^2+bx+c=0$

We have: $-x^2+5x=7\to-x^2+5x-7=0$

Therefore, answer is: C. a = -1; b = 5; c = -7.