(9x^2+4y^2)(3x+2y)(3x-2y)
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(9x^2+4y^2)(3x+2y)(3x-2y)
(3x+2y)(3x-2y)
=(9x^2-4y^2)
所以
(9x^2+4y^2)(3x+2y)(3x-2y)
=(9x^2+4y^2)(9x^2-4y^2)
=81x^4-16y^4
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9
81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
(y-x)^4(x-y)^3+2(x-y)^6(y-x)
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2分之x+y+3分之x-y;4(x+y)-(x-y)谢谢了,
2(x-y)²-3(x-y)(-y-x)
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
4x^-9y^-(2x+3y)
(x+3y-4)(2x-y)
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因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+(x-3y)(x-5y)+(x-2y)(x-4y)
[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)请帮我一下写两道计算题[(x+y)(x-y)-(x-y)的平方+2y(x-y)]除以(4y)[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以(4x)
3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9
(9x^2+4y^2)(3x+2y)(3x-2y)
(3x-2y)×(3x+2y)×(9x+4y)