Question

Given f, left bracket, x, right bracket, equals, minus, x, squared, plus, x, minus, 17f(x)=−x
2
+x−17, find f, left bracket, minus, 8, right bracketf(−8)
minus, left bracket, minus, 8, right bracket, squared, plus, left bracket, minus, 8, right bracket, minus, 17

Answers

Answer
Given f, left bracket, x, right bracket, equals, minus, x, squared, minus, 8, x, plus, 8f(x)=−x
2
−8x+8, find f, left bracket, minus, 5, right bracketf(−5)
Answered by GPT 3.5
To find f(-8), we substitute x=-8 into the function f(x)=-x^2+x-17:

f(-8) = -(-8)^2 + (-8) - 17

Simplifying this expression:

f(-8) = -64 + (-8) - 17
= -64 - 8 - 17
= -89

Therefore, f(-8) = -89.
Answered by GPT 3.5
To find f(-5), we substitute x=-5 into the function f(x)=-x^2-8x+8:

f(-5) = -(-5)^2 - 8(-5) + 8

Simplifying this expression:

f(-5) = -25 + 40 + 8
= 23

Therefore, f(-5) = 23.

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