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For the function f(x)=−7x2+8x−8, find f(4).
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For the function f(x)=−7x2+8x−8, find f(4).

For the function f(x)=−7x2+8x−8, find f(4).-example-1
User Howard Hee
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1 Answer

20 votes
20 votes

Answer:

- 88

Explanation:


f(x ) = - 7 {x}^(2) + 8x - 8 \\ plug \: x = 4 \\ \\ \implies \: f(4 ) = - 7 {(4)}^(2) + 8(4) - 8 \\\\ \implies \: f(4 ) = - 7 * 16 + 32 - 8 \\\\ \implies \: f(4 ) = - 112+ 32 - 8 \\ \\ \implies \: f(4 ) = - 120+ 32 \\\\ \implies \: f(4 ) = - 88 \\

User Shiv Deepak
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