Toán Lớp 8: Ptích đa thức thành nhân tử
a) 4y(y-3)-y+3
b) 5x-5y+ax-ay
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Toán Lớp 8: Ptích đa thức thành nhân tử
a) 4y(y-3)-y+3
b) 5x-5y+ax-ay
Comments ( 2 )
=4y(y-3)-(y-3)
=(y-3)(4y-1)
b) 5x-5y+ax-ay
= (5x-5y)+(ax-ay)
= 5(x-y)+a(x-y)
= (x-y)(5+a)