因式分解 16【x+y】的2次方-25【x-y】的2次方

问题描述:

因式分解 16【x+y】的2次方-25【x-y】的2次方

16【x+y】的2次方-25【x-y】的2次方
=【4(x+y)+5(x-y)][4(x+y)-5(x-y)]
=(9x-y)(9y-x)

16【x+y】^2-25【x-y】^2
=[4(x+y)+5(x-y)][4(x+y)-5(x-y)]
=(9x-y)(9y-x)

16【x+y】的2次方-25【x-y】的2次方
=(4(x+y)+5(x-y))(4(x+y)-5(x-y))
=(4x+4y+5x-5y)(4x+4y-5x+5y)
=(9x-y)(9y-x)