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anonymous

  • one year ago

Find x3 − 2y2 − 3x3 + z4 if x = 3, y = 5, and z = −3.

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  1. anonymous
    • one year ago
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    please give me medal

  2. Mehek14
    • one year ago
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    do you have answer choices?

  3. anonymous
    • one year ago
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    I got -23

  4. Mehek14
    • one year ago
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    \(3^3=27\\-2*5^2 = -50\\-3*3^3=-81\\-3^4=81\)

  5. Mehek14
    • one year ago
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    \(27-(-50)=77\\77-(-81)=158\\158+81=239\)

  6. anonymous
    • one year ago
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    so is that the answer because I did it on a calculator and got -23

  7. Mehek14
    • one year ago
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    yes that is what I got as the answer if you want I can double check

  8. anonymous
    • one year ago
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    that's good I was just wondering if you got what I got so I was double checking, but you can if you want.

  9. Mehek14
    • one year ago
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    ok so \(3^3=27\\-2*5^2 = -50\\27-(-50)=77\)

  10. Mehek14
    • one year ago
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    \(-3*3^3=-81\\77-(-81)=158\)

  11. Mehek14
    • one year ago
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    \(-3^4=-81\\158+(-81)=77\)

  12. Mehek14
    • one year ago
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    Well I go a different answer...

  13. Mehek14
    • one year ago
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    yes it is 77

  14. Mehek14
    • one year ago
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    I added in the last step instead of subtracting the first time I solved it

  15. anonymous
    • one year ago
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    here are the answer choices: a −185 b −77 c −23 d 85

  16. Mehek14
    • one year ago
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    gotta check again

  17. Mehek14
    • one year ago
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    I used my calculator and got -185

  18. anonymous
    • one year ago
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    okay thanks man hey can you fan me I am going to give you a medal can you give me one too

  19. Mehek14
    • one year ago
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    sure

  20. anonymous
    • one year ago
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    oh and by the way I fanned you

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spraguer (Moderator)
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