Toán Lớp 8: a)3x(5x²-2x-1)
b)(x² -2xy+3)(-xy)
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Toán Lớp 8: a)3x(5x²-2x-1)
b)(x² -2xy+3)(-xy)
Comments ( 2 )
=15x^3-6x^2-3x
b)(x² -2xy+3)(-xy)
=-x^3y+2x^2y^2-3xy