x的二次方-(9y的二次方-6y+1)因式分解

问题描述:

x的二次方-(9y的二次方-6y+1)因式分解

x²-(9y²-6y+1)
=x²-(3y-1)²
=(x+3y-1)(x-3y+1)

x的二次方-(9y的二次方-6y+1)
=x平方-(3y-1)平方
=(x-3y+1)(x+3y-1)

原式=x²-(3y-1)²
=[x+3y-1][x-(3y-1)]
=[x+3y-1][x-3y+1]

x的二次方-(9y的二次方-6y+1)
=x的二次方-(3y-1)的二次方
=(x-3y+1)(x+3y-1)