分解因式X的平方加4XY减4Y的平方

2025-06-26 06:09:08
推荐回答(1个)
回答1:

x^2+4xy-4y^2
=x^2+4xy+4y^2-8y^2
=(X+2Y)^2-8y^2
=(X+2Y-2√2Y)(X+2Y+2√2Y)