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Use synthetic substitution to find f(-2) and f(4) for each function

Use synthetic substitution to find f(-2) and f(4) for each function-example-1
User Gustav Grusell
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1 Answer

23 votes
23 votes

The function given in question 11 is


f(x)_{}=x^2-3

To calculate for f(-2) and f(4), we will have to substitute the value of 12 and 4 respectively in the equation above


\begin{gathered} f(x)_{}=x^2-3 \\ f(-2)=(-2)^2-3 \\ f(-2)=4-3 \\ f(-2)=1 \end{gathered}

Let's calculate for f(4) but substituting 4 for the value of x


\begin{gathered} f(x)_{}=x^2-3 \\ f(4)=(4)^2-3 \\ f(4)=16-3 \\ f(4)=13 \end{gathered}

User Fogbit
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