(4x-9y^2)[(2x-3y)^2+12xy]用完全平方公式计算

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(4x-9y^2)[(2x-3y)^2+12xy]用完全平方公式计算
(4x-9y^2)[(2x-3y)^2+12xy]用完全平方公式计算

(4x-9y^2)[(2x-3y)^2+12xy]用完全平方公式计算
原式=(4x-9y^2)[(2x)^2+(3y)^2-12xy+12xy]
=[(2x)^2-(3y)^2][(2x)^2+(3y)^2]
={[(2x)^2-(3y)^2]+[(2x)^2+(3y)^2]}{[(2x)^2-(3y)^2]-[(2x)^2+[(3y)^2]}
=[2(2x)^2][-2(3y)^2]
=8x^2*(-18y^2)
=-144x^2y^2

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