Question

a的平方-b的平方+2(ax-ay)+(x的平方-y的平方)因式分解

Answer 1

a的平方-b的平方+2(ax-ay)+(x的平方-y的平方)

=a²-b²+2(ax-ay)+(x²-y²)

=a²-b²+2ax-2ay+x²-y²

=(a²+2ax+x²)-(b²+2ay+y²)

=(a+x)²-(b+y)²

=(a+b+x+y)(a-b+x-y)