(2x+5y)(3x-2y)-(x-2y)^2

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(2x+5y)(3x-2y)-(x-2y)^2
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(2x+5y)(3x-2y)-(x-2y)^2
(2x+5y)(3x-2y)-(x-2y)^2

(2x+5y)(3x-2y)-(x-2y)^2
(2x + 5y)(3x - 2y) - (x - 2y)²
= 6x² + 11xy - 10y² - x² + 4xy - 4y²
= 5x² + 15xy - 14y²

(2x+5y)(3x-2y)-(x-2y)^2
=6X^2+15XY-10Y^2-4XY-(X^2+4Y^2-4XY)
=5X^2+15XY-14Y^2

（2x+5y）（3x-2y）-（x-2y）²
=6x²-4xy+15xy-10y²-(x²-2xy-2xy+4y²)
=6x²+11xy-10y²-x²+4xy-4y²
=(6x²-x²)+(11xy+4xy)-(10y²+4y²)
=5x²+15xy-14y²

化简:5(x-y)+2(x+y)-3(x-y) 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) (2x-3y)-(5x-y) (2X-3y)-(5x-y) (2x-5y)(3x+y) 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) x(x-y)2-(y-x)3 (2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 [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 化简y(x+y)+(x+y)(x-y)-x^2 [(x+2y)(x-2y)-(2x-y)^2+(3x-y))2x-5y)]/(-x)我急用 [(x+2y)(x-2y)-(2x-y)²+(3x-y(2x-5y)]/(-x)的解答 计算：x+2y/x-y+2x/y-x-3y/x-y