Question

In the following equation, what is f(5) or f (-2)?

Answer 1

Given:

The function is

$f(x)=x^2+3x-10$

Required:

What is f(5) and f(-2)?

Explanation:

We have

$f(x)=x^2+3x-10$

Now,

$\begin{gathered} f(5)=5^2+3(5)-10 \\ f(5)=25+15-10 \\ f(5)=30 \end{gathered}$

and

$\begin{gathered} f(-2)=(-2^)^2+3(-2)-10 \\ f(-2)=4-6-10 \\ f(-2)=-12 \end{gathered}$

Answer:

So, f(5) = 30 and f(-2) = -12.