因式分解(x+y)(6x+6y-1)-1 |4x²-a²-6a-9 |(x+y)²-2xz
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/09/13 10:04:08
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
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
(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)(2x-5y+4)-21
=(2x-5y)^2+4(2x-5y)-21
=(2x-5y+7)(2x-5y-3)
9(p-q)²-6(p-q)+1
=(3p-3q-1)^2
4xy+1-4x²-y²
=1-(2x-y)^2
=(1-2x+y)(1+2x-y)
=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)(2x-5y+4)-21
=(2x-5y)^2+4(2x-5y)-21
=(2x-5y+7)(2x-5y-3)
9(p-q)²-6(p-q)+1
=(3p-3q-1)^2
4xy+1-4x²-y²
=1-(2x-y)^2
=(1-2x+y)(1+2x-y)
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