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

Toán Lớp 9: a,15x^2y^3-3xy^2-6x^2yz b,6x^3y^4+2x^2y^5-8x^3y^2z

Toán Lớp 9: a,15x^2y^3-3xy^2-6x^2yz
b,6x^3y^4+2x^2y^5-8x^3y^2z

Comments ( 2 )

  1. a)15x^2y^3-3xy^2-6x^2yz
    =3xy(5xy-y+2xz)
    b)6x^3y^4+2x^2y^5-8x^3y^2z
    =2x^2y^2(3xy^2+y^3-4xz)

  2. $a) 15x^2y^3-3xy^2-6x^2yz$
    $=3xy.5xy^2-3xy.y-3xy.2xz$
    $=3xy(5xy^2-y-2xz)$
    $b) 6x^3y^4+2x^2y^5-8x^3y^2z$
    $=2x^2y^2.3xy^2+2x^2y^2.y^3-2x^2y^2.4xz$
    $=2x^2y^2(3xy^2+y^3-4xz)$
     

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