Question

Find the value of 3x²+2x+5, if x = -7.OA. 138B. -156C. 33D. 432E. 154

Answer 1

Given:

`3x^2+2x+5`

To Determine: The value of the expression when x = - 7

Solution

Substitute x = -7 into the expression

`\begin{gathered} 3x^2+2x+5 \\ =3(-7)^2+2(-7)+5 \\ =3(49)-14+5 \\ =147-9 \\ =138 \end{gathered}`

Hence, the value of the expression is 138, OPTION A