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

Toán Lớp 8: Thực hiện phép tính: a, x(2x+3) b, (36x⁵y²+18x³y-12x²y):6xy

Toán Lớp 8: Thực hiện phép tính:
a, x(2x+3)
b, (36x⁵y²+18x³y-12x²y):6xy

Comments ( 2 )

  1. a)x(2x+3)
    =x.2x+x.3
    =2x^2+3x
    b)(36x^5y^2+18x^3y-12x^2y):(6xy)
    =[(36x^5y^2):(6xy)]+[(18x^3y):(6xy)]-[(12x^2y):(6xy)]
    =6x^4y+3x^2-2x

  2. Giải đáp:
     $a) x.(2x+3)$
    $= x.2x+x.3$
    $= 2x²+3x$
    $\text{*Áp dụng Tổng quát A.(B+D)= AB+AD}$
    $b) (36x^5y^2+18x^3y-12x^2y):6xy$
    $= (36x^5y^2:6xy)+(18x^3y:6xy)-(12x²y:6xy)$
    $= 6x^4y+3x²-2x$
    $@Win$
     

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