Question

question 13 of 22. if a function is represented in the form f(x)=x² + 7x + 8, then what is the value of the function f(x) when the value of the variable is x = -1?

Explanation:

Step1: Substitute x = - 17 into the function

$f(x)=x^{2}+7x + 8$, so $f(-17)=(-17)^{2}+7\times(-17)+8$.

Step2: Calculate each term

$(-17)^{2}=289$, $7\times(-17)=-119$. Then $f(-17)=289-119 + 8$.

Step3: Perform addition and subtraction

$289-119=170$, and $170 + 8=178$.

Answer:

178