(2x-3y)(3x-4y)的解

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(2x-3y)(3x-4y)的解
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(2x-3y)(3x-4y)的解
(2x-3y)(3x-4y)的解

(2x-3y)(3x-4y)的解
(2x-3y)(3x-4y)
=6x²-8xy-9xy+12y²
=6x² -17xy +12y²

6x-xy-12y

[(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) 已知(x+y)2 =2,(x-y)3 =3,求(x+y)7(x-y)2(x+y)3(y-x)4 的值 解{(x+2y)(x-2y)-(x-2y)的平方+8y(x+y)}除4x 分解因式(x+y)的平方-3(x+y) (y-x)^4(x-y)^3+2(x-y)^6(y-x) (x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5 12(x+y)^3(y-x)/【4(x+y)^2(x-y)】 (x+y)/2- x-y/2=6 3(x+y)=4(x-y) 2分之x+y+3分之x-y;4(x+y)-(x-y)谢谢了, (x+2y)(3x^2+4y^2)-(x+2y)^2(x+2y) )RT这才是对的!(x+2y)(3*x^2+4*y^2)-(x+2y)^2 *(x-2y) 2(x+y)-(x-3y)=13 4(x+y)+3(x-3y)=1解方程组 2(x+y)-(x-3y)=13 4(x+y)+3(x-3y)=1 2(x-y)²-3(x-y)(-y-x) X×X-2XY-Y×Y+2X-2Y+2=02X×2X-4XY-2Y×2Y+3X-3Y+4=0X×X+2XY+Y×Y+X+Y-56=0X×X-2XY+Y×Y-X+Y-12=0X×X-3XY+Y×Y=-13X×3X-XY+3Y×3Y=13 两个在一起的方程之间有所联系(要求一步一步写出来) [(x+2y)的平方-(x+y)(x-y)-5y的平方]除以(2x)[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以(4x)[(2x+y)的平方-(-y+2x)(y+2x)]除以(2y)help me!!!!! 解方程组:2(x +y)-3(x-y)=3;4(x+ y)+ 3(x-y)=15 大家帮帮我把(-2y²)³+y乘y的5次方 3x(3y-x)-(4x-3y)(x+3y) 已知|2-x|与|x-y+4|互为相反数,求代数式3(x-y)-5(x-y)*2-3(x-y)+(y-x)*2-4(x+y)+3(y-x)的值 已知实数x、y满足|2x-y+1|+3根号3x-2y+4=0,求代数式[(x-y)/(x-2y)]/(x的平方-2y)/[(x的平方-y的平方)/x的已知实数x、y满足|2x-y+1|+3根号3x-2y+4=0,求代数式[(x-y)/(x-2y)]/(x的平方-2y)/[(x的平方-y的平方)/(x的 实数x,y满足x+2y(这个y就是y)=4,则3x+9y(这个x,y是指数)的最小值为