计算:2(2x-3y)-3(4x-5y)
计算:(3x-y)2-(2x+y)2+5x(y-x)
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算4xy+(x-2y)的平方+(x+3y)(3y-x)
计算:(X+Y)^5÷(-X-Y)^3*(X-Y)^2
计算:(x-4y)(2x+3y)-(x+2y)(x-y).
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
(x+y)^2-(3x-2y)^2计算
计算[(3x——2y)(3x+2y)—(x+2y)(5x—2y)]除以4x
整式的乘除「(3x+2y)(3x-2y)-(x+2y)(5x-2y)」÷(4x)如何计算
计算:(-x-2y) * (3x-y)
计算:3x+2y/4=2x+y/5=x-y+1/6.(要求有过程)
计算 1.(-2x)^3-3x乘(x-2x^2) 2.【(x+2y)^2-(x-2y)(x+2y)】÷4y