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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: (-20x mũ 5 y ³+ 1x mũ 4y mũ 4 – 5x ²y mũ 5):A=5x ²y ³

Toán Lớp 8: (-20x mũ 5 y ³+ 1x mũ 4y mũ 4 – 5x ²y mũ 5):A=5x ²y ³

Comments ( 2 )

  1. $(-20x^5y^3+x^4y^4-5x^2y^5):A=5x^2y^3$
    $⇔A=(-20x^5y^3+x^4y^4-5x^2y^5):5x^2y^3$
    $⇔A=(-20x^5y^3-5x^2y^5+x^4y^4):5x^2y^3$

    toan-lop-8-20-mu-5-y-1-mu-4y-mu-4-5-y-mu-5-a-5-y

  2. (-20x^5y^3+x^4y^4-5x^2y^5):A=5x^2y^3
    ⇔A=(-20x^5y^3+x^4y^4-5x^2y^5): 5x^2y^3
    ⇔A=(-20x^5y^3): 5x^2y^3+x^4y^4: 5x^2y^3-5x^2y^5: 5x^2y^3
    ⇔A=-4x^3+1/5x^2y-y^2
    Vậy A=-4x^3+1/5x^2y-y^2
     

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222-9+11+12:2*14+14 = ? ( )

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