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

Toán Lớp 8: Tính A=(x/xy-y^2+2x-y/xy-x^2).x^2y-xy^2/x^2-2xy+y^2

Tháng Tư 30, 2022 Toán học 1 Comment 0 views

Toán Lớp 8: Tính
A=(x/xy-y^2+2x-y/xy-x^2).x^2y-xy^2/x^2-2xy+y^2

Comments ( 1 )

  1. lanhuongthu
    lanhuongthu
    30 Tháng Tư, 2022 at 8:01 chiều
    Reply
    A=(x/(xy-y^2)+(2x-y)/(xy-x^2)). (x^2y-xy^2)/(x^2-2xy+y^2)
    ->A=[x/(y(x-y))+(2x-y^2)/(x(y-x))] . (xy(x-y))/((x-y)^2)
    ->A=(x.x+(2x-y).y)/(xy(x-)). (xy)/(x-y)
    ->A=(x^2-2xy+y^2)/((x-y)^2)
    ->A=((x-y)^2)/((x-y)^2)
    ->A=1

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

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