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anonymous

  • one year ago

Find the value of –4[g(2)] if g(x) = x2 – 5x.

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  1. anonymous
    • one year ago
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    @gabbyalicorn

  2. gabbyalicorn
    • one year ago
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    Sorry, I'm not very good at math...

  3. anonymous
    • one year ago
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    oh, wrong person @gabbyalicorn sorry

  4. anonymous
    • one year ago
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    thx for helping @geerky42

  5. geerky42
    • one year ago
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    First, we need to find g(2). To find g(2), plug x=2 into g(x) \(g(x) = x^2+5x\\~\\ g(\color{red}{\textbf{2}}) = (\color{red}{\textbf{2}})^2+5(\color{red}{\textbf{2}})\)

  6. geerky42
    • one year ago
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    What is \(2^2+5\cdot2\)?

  7. anonymous
    • one year ago
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    14

  8. anonymous
    • one year ago
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    @geerky42

  9. geerky42
    • one year ago
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    Right. So \(g(2) = 14\) Now what is \(\text-4[g(2)]\)?

  10. geerky42
    • one year ago
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    It's just -4 times 14

  11. anonymous
    • one year ago
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    -56 @geerky42 thanks

  12. geerky42
    • one year ago
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    No problem

  13. anonymous
    • one year ago
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    no thats wrong..it was minus 5x so it would have been 34...thx anyways

  14. anonymous
    • one year ago
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    @geerky42

  15. anonymous
    • one year ago
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    i mean 24

  16. geerky42
    • one year ago
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    oh my bad. I misread it as plus. but still you get the idea what to do in similar problems, right?.

  17. anonymous
    • one year ago
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    yeah

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