Find the quadratic equation whose roots are x = -2 or x = 7
A
x2 + 2x - 7 = 0
B
x2 - 2x + 7 = 0
C
x2 + 5 +14 = 0
D
x2 - 5x - 14 = 0
E
x2 + 5x - 14 = 0
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
x + 2 and x - 7 are factors
(x+2)(x+7) = 0
x(x-7) + 2(x-7) = 0
x2 - 7x + 2x - 14 = 0
x2 - 5x - 14 = 0
Source: Myschool Past Questions Archive (Record #22052)