4x^2+2x-9y^2-3y
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4x^2+2x-9y^2-3y4x^2+2x-9y^2-3y4x^2+2x-9y^2-3y4x^2+2x-9y^2-3y=(2x)²+2x+(1/2)²-[(3y)²+3
4x^2+2x-9y^2-3y
4x^2+2x-9y^2-3y
4x^2+2x-9y^2-3y
4x^2+2x-9y^2-3y
=(2x)²+2x+(1/2)²-[(3y)²+3y+(1/2)²]
=(2x+1/2)²-(3y+1/2)²
=(2x+1/2+3y+1/2)(2x+1/2-3y-1/2)
=(2x+3y+1)(2x-3y)
解
4x²+2x-9y²-3y
=(4x²-9y²)+(2x-3y)
=(2x-3y)(2x+3y)+(2x-3y)
=(2x-3y)(2x+3y+1)
81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
(x+3y-4)(2x-y)
计算(2x-3y)(x+4y)-(3x+y)(x-2y)(2x-3y)(x+4y)-(3x+y)(x-2y)
因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+(x-3y)(x-5y)+(x-2y)(x-4y)
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
x(x-y)2-(y-x)3
(4x-3y)(5x+2y)-2x(9x-5y) 等于多少
9y=3x-(x-1),4(x+y)-(2x+4)=8y
根据3(x+y)-2(x-y)=11,4(x+y)+3(x-y)=9可得出x+y= ,x-y=
[2/3x-2/x+y(x+y/3x-x-y)]/x-y/x
化简:{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x
计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x
化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x
[(x+y)(x-y)-(x-y)²+2y(x-y)]÷4y