【把下列各式因式分解】3a(x-y)-(x-y)【把下列各式因式分解】3a(x-y)-(x-y)a(m-2)+b(2-m)2(y-x)²+3(x-y)mn(m-n)-m(n-m)²
问题描述:
【把下列各式因式分解】3a(x-y)-(x-y)
【把下列各式因式分解】
3a(x-y)-(x-y)
a(m-2)+b(2-m)
2(y-x)²+3(x-y)
mn(m-n)-m(n-m)²
答
3a(x-y)-(x-y)=(x-y)(3a-1)
a(m-2)+b(2-m)=(m-2)(a-b)
2(y-x)²+3(x-y)=(x-y)(2x-2y+3)
mn(m-n)-m(n-m)²=(m-n)(mn-m²+n²)