Question

Evaluate 3(x + 4) + 2x - x2 for x = 5.
O A. O
O B. -4
O C. -12
O D. 40​

Answer 1

Answer:

$12$ is the answer

Step-by-step explanation:

Given

$x = 5$

Required

Evaluate

$3(x + 4) + 2x - x^2$

To answer this question, we simply substitute 5 for x in $3(x + 4) + 2x - x^2$

$3(x + 4) + 2x - x^2$ becomes

$3(5 + 4) + 2*5 - 5^2$

$3(9) + 10 - 25$

Open all brackets

$3*9 + 10 - 25$

$27 + 10 - 25$

$12$