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

Toán Lớp 8: a)2xy^2*(5x^2+3xy-6y^3 b)-x^2y*(xy^2-1/2xy+3/4x^2y^2 c)(3xy-x^2+y)*2/3x^2y d)2/3x^3*(x+x^3-3/4x^5)

Toán Lớp 8: a)2xy^2*(5x^2+3xy-6y^3
b)-x^2y*(xy^2-1/2xy+3/4x^2y^2
c)(3xy-x^2+y)*2/3x^2y
d)2/3x^3*(x+x^3-3/4x^5)

Comments ( 2 )

  1. $\text{Giải đáp+Lời giải và giải thích chi tiết:}$
    a) 2xy² (5x²+3xy-6y³)=10x³y+6x²y³-12xy^5
    b) -x²y(xy²-1/2xy+3/4x²y²)=-x³y³-x/2-3/4y
    c) (3xy-x²+y).2/3x²y=2/x-2/3y+2/3x²
    d) 2/3x³(x+x³-3/4x^5)=2/3x²+2/3-1/2x^8

  2. a)2xy²(5x²+3xy-6y³)=10x³y²+6xy³-12xy^5
    b)-x^(2)y(xy^2-1/(2)xy+3/4x^2y^2)=-xy³+1/2xy²-3/4x^4y³
    c)(3xy-x²+y)2/3x²y=2x³y²-2/3x^4y²+2/3x²y²
    d)2/3x³(x+x³-3/4x^5)=2/3x^4+2/3x^6-1/2x^8
     

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

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