因式分解:4x²-8x-12y-9y²

问题描述:

因式分解:4x²-8x-12y-9y²

4x²-8x-12y-9y²
=(4x²-9y²)-4(2x+3y)
=(2x+3)(2x-3y)-4(2x+3y)
=(2x+3y)(2x-3y-4)