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

Toán Lớp 7: thu gon đa thức A=1/3 ax 4/5 x mũ 2 y

Toán Lớp 7: thu gon đa thức A=1/3 ax 4/5 x mũ 2 y

Comments ( 2 )

  1. Giải đáp:
    $\\$
    A = 1/3 ax . 4/5 x^2y
    -> A = (1/3 . 4/5) a (x . x^2)y
    -> A = 4/15 a x^3y
    Vậy A = 4/15 a x^3y
     

  2. =$\frac{1}{3}$x .  $\frac{4}{5}$$x^{2}$ y
    =($\frac{1}{3}$. $\frac{4}{5}$)(x.x²) y
    =$\frac{4}{15}$ x³y
     

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