[(x-y)²+(x+y)²](x²-y²) 102²简便方法计算 1
[(x-y)²+(x+y)²](x²-y²) 102²简便方法计算 1
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
计算:1、(xy分之x²-y²)×(x-y分之x)-(y分之x);
计算 [12(x+y)³(y-x)]³÷[4(x+y)²(x-y)]²
计算:(x+y)²-4(x+y)(x-y)+4(x-y)²
计算(x²/x+2y)-x+2y-2
1、y-x/x²-y²
计算:[(x+¼y)+(x-¼y)](2x²-1/8y²)
因式分解:x²(x-y)+(y-x)
计算(x-2y-1)(x-2y+1)-(x-2y-1)²
数学用乘法公式计算(x+y+1)(x+y-1)(2x-y-3)²
运用乘法公式计算:(1)(x-y)(x+y)-(2x-y)²