多项式ax-ay,x^2-y^2,x^2-2xy+y^2的公因式是
问题描述:
多项式ax-ay,x^2-y^2,x^2-2xy+y^2的公因式是
答
ax-ay=a(x-y),x^2-y^2=(x+y)(x-y),x^2-2xy+y^2=(x-y)^2
公因式是x-y