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anonymous

  • 5 years ago

add: (3x^2-4xy+y^2)+-8x^2-9xy-y^2)+(x^2+xy-2y^2)

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  1. anonymous
    • 5 years ago
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    Sry the 8x^2 should have a parenthesis around it also

  2. amistre64
    • 5 years ago
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    line them up its easier: 3x^2 -4xy +1y^2 -8x^2 -9xy -1y^2 1x^2 +1xy -2y^2 ----------------- -4x^2 -12xy -2y^2

  3. anonymous
    • 5 years ago
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    what happened to the x^2 and xy where did they go, I'm not understanding that part

  4. amistre64
    • 5 years ago
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    -4x^2 -12xy -2y^2 ^^^^ ^^^^ i dont quite understand your response

  5. anonymous
    • 5 years ago
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    in the last part of the equation where did the x go

  6. anonymous
    • 5 years ago
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    i thought you where supposed to do what was in each bracket and then add those together

  7. amistre64
    • 5 years ago
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    \(3x^2\) \( -4xy\) \( +1y^2 \) \(-8x^2\) \( -9xy\) \( -1y^2 \) \(1x^2\) \( +1xy\) \( -2y^2 \) ----------------- \(-4x^2\) \( -12xy \) \(-2y^2\)

  8. amistre64
    • 5 years ago
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    the brackets are as used up as they can get; there is nothing to do inside of them

  9. anonymous
    • 5 years ago
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    ok i put this question in last night and got the answer you gave me but they said the 4x^2 was positive not negative.

  10. amistre64
    • 5 years ago
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    3+1-8 = -4 4-8 = -4 -4 = -4

  11. anonymous
    • 5 years ago
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    k

  12. amistre64
    • 5 years ago
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    http://www.wolframalpha.com/input/?i=%283x^2-4xy%2By^2%29%2B%28-8x^2-9xy-y^2%29%2B%28x^2%2Bxy-2y^2%29 agrees

  13. amistre64
    • 5 years ago
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    this was your question from last night :) same answer http://openstudy.com/users/amistre64#/users/amistre64/updates/4de0628dc9a28b0b14db66c2

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