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ashleyb

  • 3 years ago

a function is defined as f(x)= -8x^2. what is f(-3)?

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  1. jim_thompson5910
    • 3 years ago
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    replace each x with -3 and evaluate

  2. jim_thompson5910
    • 3 years ago
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    f(x)= -8x^2 f(-3)= -8(-3)^2 f(-3) = ???

  3. ashleyb
    • 3 years ago
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    i got 576

  4. jim_thompson5910
    • 3 years ago
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    you first square -3 to get 9 THEN you multiply you don't multiply -8 and -3 to get 24 and square it to get 576

  5. jim_thompson5910
    • 3 years ago
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    PEMDAS says that you evaluate exponents first, then multiplication comes next

  6. ashleyb
    • 3 years ago
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    -72

  7. jim_thompson5910
    • 3 years ago
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    better

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