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anonymous

  • one year ago

Find the value of the expression 4a^4 − 2b^2 + 40 when a = 2 and b = 7. Can someone Help plss

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  1. tanya123
    • one year ago
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    Given: \(\ \sf\color{red}{a \color{black}{=} 2} \) \(\ \sf\color{blue}{b \color{black}{=} 7}\) Equation: \(\ \sf 4\color{red}{a}^4 − 2\color{blue}{b}^2 + 40\) Substitute the values you're given into your equation. Continue to solve.

  2. anonymous
    • one year ago
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    i already tried to solve this problem many times & i keep getting the same answer that is incorrect.. -.- @tanya123

  3. tanya123
    • one year ago
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    \(\ 4(\sf\color{red}{2})^2 - 2(\color{blue}{7})^2 + 40 \implies 4(4) - 2(49) + 40 = 16 - 98 + 40 = -42 \)

  4. anonymous
    • one year ago
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    its not one of the answer choices..

  5. tanya123
    • one year ago
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    Oh flutter, made a typo. 4a^4 =/= 4a^2 You get the idea. Try it yourself.

  6. tanya123
    • one year ago
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    Overall answer is 6, if you must know.

  7. anonymous
    • one year ago
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    i kind of get it now.. but thank you :)

  8. tanya123
    • one year ago
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    You're welcome.

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