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Find f(-2) if f(x)= x^2 + 8x
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Find f(-2) if f(x)= x^2 + 8x

User Meryovi
by
3.0k points

2 Answers

1 vote

Explanation:

  • f(x) = x² + 8x

f(-2) = (-2)² + 8(-2) = 4 - 16 = -12

User Sergey Kravchenko
by
2.7k points
4 votes

Answer:

f(-2) = -12

Explanation:

f(x)= x² + 8x

We want to find f(-2)

f(-2) = (-2)² + 8(-2)

Apply exponent : (-2)² = 4

f(-2) = 4 + 8(-2)

multiply 8 and - 2 : 8 * -2 = -16

f(-2) = 4 - 16

subtract 16 from 4 : 4 - 16 = -12

f(-2) = -12

User Eldad Levy
by
3.3k points
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