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

Toán Lớp 7: A= 5x^3 y^2 z.(-2x^3 y^5 z^3) A=6x^3 yz .3x^4 y^5 z^2

Toán Lớp 7: A= 5x^3 y^2 z.(-2x^3 y^5 z^3)
A=6x^3 yz .3x^4 y^5 z^2

Comments ( 2 )

  1. $A= 5x^3 y^2z.(-2x^3 y^5 z^3)$
    $A= 5.(-2).(x^3.x^3).( y^2.y^5).(z.z^3)$
    $A=-10x^6y^7z^4$
    ⊕ Ú ÒA ⊕
    $B=6x^3 yz .3x^4 y^5 z^2$
    $B=(6.3)(x^3.x^4)(y.y^5).(z.z^2)$
    $B=18x^7y^6z^3$
     

  2. a)
    A= 5x^3 y^2 z.(-2x^3 y^5 z^3)
    A=[(5x^3 . (-2x^3)](y^2.y^5)(z.z^3)
    A= -10x^6 . y^7 . z^4
    b)
    A= 6x^3 y. z . 3x^4 y^5 .z^2
    A = (6.3)(x^3.x^4)(y.y^5)(z.z^2)
    A = 18x^7y^6z^3

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