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

Toán Lớp 8: a, 3xy.5x^2y^3 b, xy^2(x+xy+5) c, (x^3-x^2-x+15) : (x+3) giúp mik vs

Toán Lớp 8: a, 3xy.5x^2y^3
b, xy^2(x+xy+5)
c, (x^3-x^2-x+15) : (x+3)
giúp mik vs

Comments ( 2 )

  1. Giải đáp:

    a)

    3xy.5x^(2)y^3

    =3.5.x.x^(2).y.y^3

    =15x^(3)y^4

    b)

    xy^(2).(x+xy+5)

    =xy^(2).x+xy^(2).xy+xy^(2).5

    =x^(2)y^(2)+x^(2)y^(3)+5xy^2

    c)

    toan-lop-8-a-3y-5-2y-3-b-y-2-y-5-c-3-2-15-3-giup-mik-vs

  2. Đáp án:

     

    Giải thích các bước giải:

     

    toan-lop-8-a-3y-5-2y-3-b-y-2-y-5-c-3-2-15-3-giup-mik-vs

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