Question

Select ALL values of x that will make the following equation true.

x^2 - 5x = 24

A.x = -3


B.x = 0


C.x = 4


D.x = 8


E.x = 12

Answer 1

TRUE: A, D
FALSE: B, C, E

A. (-3)^2 - 5(-3) = 24
(-3x-3) - (-15) = 24
9 + 15 = 24
24 = 24
A. TRUE

B. (0)^2 - 5(0) = 24
0 - 0 = 24
0 = 24
B. FALSE

C. (4)^2 - 5(4) = 24
16 - 20 = 24
-4 = 24
C. FALSE

D. (8)^2 - 5(8) = 24
64 - 40 = 24
24 = 24
D. TRUE

E. (12)^2 - 5(12) = 24
144 - 60 = 24
84 = 24
E. FALSE

Answer 2

Option A and D is the answer