一道数学题:(2x-y)(2x+y)+(2x+y)²
一道数学题:(2x-y)(2x+y)+(2x+y)²
幂的乘方,一道数学题:计算:-(x-y)^2乘(y-x)^3
问个数学题,(2x+3y)^2-(2x+y)(2x-y)
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
八下数学题一道计算:[(4x²-y²)÷4x²-4xy+y²/2x-y]
(x-2y)²+(2x-4y)(x+y)+(x+y)²
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
(x-y/x+2y)³
数学题化简再求值(1/x-y+1/x+y)÷x^2 y^2/x^2-y^2,其中x=3,y=-√2
帮忙算一道数学题2(x-2y)2-4(2y-x)+(x-2y)2-3(x-2y) 其中x=-1 y=1/2
解两道数学题,写出详细步骤 (1)(x-y)²-4(x+y)² (2)x³+x²
求一道数学题的解:已知|3x+y—2|+(2x+3y+1)2=0,求x、y的解