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Chapter 7: Problem 42

Evaluate each function at the given value of the variable. \(h(r)=2 r^{2}-4\) a. \(h(5)\) b. \(h(-1)\)

Short Answer

Expert verified
\(h(5)=46\) and \(h(-1)=-2\).

Step by step solution

01

Substitute r = 5

Substitute r = 5 into the function \(h(r)=2 r^{2}-4\), so we get \(h(5)=2(5)^{2}-4=2(25)-4=50-4=46\).
02

Substitute r = -1

Substitute r = -1 into the function \(h(r)=2 r^{2}-4\), so we get \(h(-1)=2(-1)^{2}-4=2(1)-4=2-4=-2\).

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