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gabbyalicorn

  • one year ago

What is the value of 4a^3 – 2b^2 + 5 when a = 3 and b = −2?

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  1. gabbyalicorn
    • one year ago
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    |dw:1441990554165:dw|

  2. gabbyalicorn
    • one year ago
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    |dw:1441990646663:dw|

  3. Luigi0210
    • one year ago
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    You have to do the exponents first before multiplying anything else..

  4. gabbyalicorn
    • one year ago
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    Do i subtract the exponents?

  5. Luigi0210
    • one year ago
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    Noo, just do the exponent first, because what you did will give you a totally different answer.. lemme show you what I mean: If we did what you did: \(\large 4*3^3 \) would give \(\large 12^3 \) which is \(\large 1728\) .. As opposed to \(\large 4*(3^3) \) which should be \(\large 4*27 \) which is \(\large 108\)

  6. Luigi0210
    • one year ago
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    See the difference in just the first term?

  7. gabbyalicorn
    • one year ago
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    Ah, I see what you did.

  8. gabbyalicorn
    • one year ago
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    |dw:1441991180621:dw|

  9. Luigi0210
    • one year ago
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    Yes, now just finish multiplying and whatever else you need, you should get the right answer.

  10. anonymous
    • one year ago
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    https://en.wikipedia.org/wiki/Exponentiation

  11. gabbyalicorn
    • one year ago
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    |dw:1441991390252:dw|

  12. gabbyalicorn
    • one year ago
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    is 105 the answer?

  13. Luigi0210
    • one year ago
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    Yup, should be (:

  14. gabbyalicorn
    • one year ago
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    :O :D Thank you for helping me @Luigi0210

  15. Luigi0210
    • one year ago
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    No prob \(\LARGE \color{green}{\star^{\star}} \)

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