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chelsa11136

  • 4 years ago

If f(x)=x^2+3x-4, find the value of f(-4). Show all work.

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  1. carrie14stewart
    • 4 years ago
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    okay all u do is plug in -4 for all x's

  2. carrie14stewart
    • 4 years ago
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    so -4^2 is what? 16

  3. carrie14stewart
    • 4 years ago
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    now add 3 X -4 which is 12 so 12+16 is what? 28

  4. carrie14stewart
    • 4 years ago
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    now subtract 4 from 28 which is ur final answer 24

  5. chelsa11136
    • 4 years ago
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    But the 12 would be negative?

  6. carrie14stewart
    • 4 years ago
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    yes sorry

  7. chelsa11136
    • 4 years ago
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    So would it be 0???

  8. carrie14stewart
    • 4 years ago
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    so now its -12+16 than take that and subtract 4

  9. carrie14stewart
    • 4 years ago
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    yes the answer is 0 good job!

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