因式分解4x平方-y平方-6y-9

2025-04-14 19:28:21
推荐回答(1个)
回答1:

4x^2-y^2-6y-9
=(2x)^2-(y^2+6y+9)
=(2x)^2-(y+3)^2
=(2x-y-3)(2x+y+3)