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

Toán Lớp 8: Phân tích đa thức thành nhân tử : a ) x^2-x b ) 5x^2.(x-2y)-15x(x-2y)

Toán Lớp 8: Phân tích đa thức thành nhân tử :
a ) x^2-x
b ) 5x^2.(x-2y)-15x(x-2y)

Comments ( 2 )

  1. a ) x²-x
    =x(x+1)
    b)5x^2.(x-2y)-15x(x-2y)
    =(x-2y)(5x²-15x)
    =5x(x-2y)(x-3)

  2. a,x^2 – x = x(x-1)
    b,5x^2(x-2y) – 15x(x-2y) = (x-2y)(5x^2 – 15x) = 5x(x-2y)(x-3)

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

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