4x²y³÷(-½xy)²=
4x²y³÷(-½xy)²=
(-2x³y)²÷(-4xy)=?
﹙4x³y²-2x⁴y²-½xy)÷(-1/2xy) (^人^)
2x+y=0,求4x²+2xy(x+y)+y³
[-xy/(x-y)²]²×(y²-xy/x)³
已知2x+y=0,求x-2y/x²+xy乘(x²-y²)÷x²-4xy+4y
计算4x²y³÷(﹣½xy)²=
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
1.化简:x²-4y²/x²+y²+2xy÷2y+x/x²+xy.
x²+y²+2xy分之x²-4y² ÷x²+xy分之2y+x
(x²+2xy+y²分之x²-4y²)÷(x²+xy分之x+2y)
4x²+8xy=y²+xy,求x:y=?