Evaluate 3 (x-4) + 2x-x2 for x=5

A. - 12

B. 0

C. - 4

D. 40

A

Step-by-step explanation:

Substitute x = 5 into the expression

3 (5 - 4) + 2 (5) - 5²

= (3 * 1) + 10 - 25 = 3 + 10 - 25 = 13 - 25 = - 12 → A

A. - 12

Step-by-step explanation:

First step.

Simplify the expression:

3 (x - 4) + 2x - x² use the distributive property a (b - c) = ab - ac

= 3x - 12 + 2x - x² combine like terms

= - x² + (3x + 2x) - 12

= - x² + 5x - 12

Put x = 5 to the expression:

-5² + 5 (5) - 12 = - 25 + 25 - 12 = - 12