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anonymous

  • one year ago

Can someone please check my answer to this equation? |-4b - 8 | + |-1 - b^2 | + 2b^3 ; b = -2 the answer I got is 69, is this correct?

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  1. Vocaloid
    • one year ago
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    nope, not quite, lets break it down step by step

  2. anonymous
    • one year ago
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    ok I'm ready

  3. Vocaloid
    • one year ago
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    |-4b - 8 | = ?

  4. anonymous
    • one year ago
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    dont you have to plug -2 into b first?

  5. Vocaloid
    • one year ago
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    yeah, what do you get when you do that?

  6. anonymous
    • one year ago
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    16

  7. anonymous
    • one year ago
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    0 sorry

  8. Vocaloid
    • one year ago
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    actually, yes, 0

  9. anonymous
    • one year ago
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    lol i thought so

  10. Vocaloid
    • one year ago
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    |-4b - 8 | = |8-8| = 0

  11. Vocaloid
    • one year ago
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    |-1 - b^2 | = ?

  12. anonymous
    • one year ago
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    i got -5

  13. Vocaloid
    • one year ago
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    almost, remember that the absolute value sign means that you remove the negative sign at the end |-1-b^2| = |-1-4| = |-5| = 5, with me so far?

  14. anonymous
    • one year ago
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    yes

  15. Vocaloid
    • one year ago
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    last step, find 2b^3 (be careful with signs!)

  16. anonymous
    • one year ago
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    is it -64?

  17. Vocaloid
    • one year ago
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    yup! now all that's left is 5 - 64 = your answer

  18. anonymous
    • one year ago
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    -59

  19. Vocaloid
    • one year ago
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    good! that's it.

  20. anonymous
    • one year ago
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    thank you :)! @Vocaloid

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