因式分解(x+y)(6x+6y-1)-1 |4x²-a²-6a-9 |(x+y)²-2xz-2yz+z²全答加5分
问题描述:
因式分解(x+y)(6x+6y-1)-1 |4x²-a²-6a-9 |(x+y)²-2xz-2yz+z²全答加5分
x²-y-x+y²+2xy-6 ||| (2x-5y)(2x-5y+4)-21 ||| 9(p-q)²-6(p-q)+1 |||4xy+1-4x²-y²补充的答出再加10分
答
(x+y)(6x+6y-1)-1=6(x+y)^2-(x+y)-1=(3x3y+1)(2x+2y-1)4x²-a²-6a-9=4x^2-(a-3)^2=(2x-a+3)(2a+a-3)(x+y)²-2xz-2yz+z²这个没法算x²-y-x+y²+2xy-6=(x+y)^2-x-y-6=(x+y-3)(x+y+2)(2x-5y)...