Question

What is the solution to the following equation if x = 5?

x^3 + 2x^2 +x + 6

A. 756

B. 186

C. 46

D. 26
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Answer 1

(B). 186

Explanation:

(5)^3 + 2 x 5^2 + 5 + 6 =

5 x 5 x 5 + 2 x 5 x 5 + 5 + 6 =

125 + 2 x 25 + 5 + 6 =

125 + 50 + 5 + 6 =

186

Answer 2

Explanation:

`{x}^(3) + 2{x}^(2) + x + 6 \\ = {5}^(3) + 2 * {5}^(2) + 5 + 6 \\ = 125 + 50 + 11 \\ = 186`

Thus, option B 186 is the correct answer.