Question

4a方-4b方+X方-y方+4(aX-by)分解因式

Answer 1

解

4a²-4b²+x²-y²+4(ax-by)

=(4a²+4ax+x²)-(4b²+y²+4by)

=(2a+x)²-(2b+y)²

=(2a+x-2b-y)(2a+x+2b+y)