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

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
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

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
(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)

(x+y)(6x+6y-1)-1
=6(x+y)²-(x+y)-1
=(3x+3y+1)(2x+2y-1)
4x²-a²-6a-9
=(2x)²-(a+3)²
=(2x+a+3)(2x-a-3)
|(x+y)²-2xz-2yz+z²
=(x+y)²-2z(x+...

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(x+y)(6x+6y-1)-1
=6(x+y)²-(x+y)-1
=(3x+3y+1)(2x+2y-1)
4x²-a²-6a-9
=(2x)²-(a+3)²
=(2x+a+3)(2x-a-3)
|(x+y)²-2xz-2yz+z²
=(x+y)²-2z(x+y)+z²
=(x+y-z)²
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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(x+y)(6x+6y-1)-1= 6(x+y)² -(x+y)-1 = (2x+2y -1)(3x+3y +1)
4x²-a²-6a-9 =(2x)² -(a+3)² =(2x +a+3)(2x -a-3)
(x+y)²-2xz-2yz+z² = (x+y)²-2(x+y)z+z² =(x...

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(x+y)(6x+6y-1)-1= 6(x+y)² -(x+y)-1 = (2x+2y -1)(3x+3y +1)
4x²-a²-6a-9 =(2x)² -(a+3)² =(2x +a+3)(2x -a-3)
(x+y)²-2xz-2yz+z² = (x+y)²-2(x+y)z+z² =(x+y -z)²
x²-y-x+y²+2xy-6 =(x+y)² -(x+y) -6 =(x+y +2)(x+y -3)
(2x-5y)(2x-5y+4)-21 =(2x -5y)² +4(2x -5y) -21 =(2x -5y -3)(2x-5y+7)
9(p-q)²-6(p-q)+1 =[3(p-q)]²-6(p-q)+1=(3p-3q -1)²

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(x+y)(6x+6y-1)-1
=6(x+y)²-(x+y)-1
=(2x+2y-1)(3x+3y+1)
4x²-a²-6a-9
=4x²-(a+3)²
=(2x-a-3)(2x+a+3)
(x+y)²-2xz-2yz+z²
=(x+y)²-2z(xz+yz...

全部展开

(x+y)(6x+6y-1)-1
=6(x+y)²-(x+y)-1
=(2x+2y-1)(3x+3y+1)
4x²-a²-6a-9
=4x²-(a+3)²
=(2x-a-3)(2x+a+3)
(x+y)²-2xz-2yz+z²
=(x+y)²-2z(xz+yz)+z²
=(x+y-z)²
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)

收起