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I need help with this question to understand the other ones question A

I need help with this question to understand the other ones question A-example-1

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Given:

A function:


f(x)=5x-2

To find:

f(3) and f(-2).

Solution:

The given equation is f(x) = 5x - 2.

Replace x by 3 in the given equation:


\begin{gathered} f(3)=5(3)-2 \\ =15-2 \\ =13 \end{gathered}

Replace x by -2 in the given equation:


\begin{gathered} f(-2)=5(-2)-2 \\ =-10-2 \\ =-12 \end{gathered}

Thus, f(3) = 13, f(-2) = -12.

User Jozef Spisiak
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