Question

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

Answer 1

`12` is the answer

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`