(xy+1)(xy-1)(x²y²+1)-(xy-1)²+8x的六次方y的三次方/2x的四次方y越快越好
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(xy+1)(xy-1)(x²y²+1)-(xy-1)²+8x的六次方y的三次方/2x的四次方y越快越好
(xy+1)(xy-1)(x²y²+1)-(xy-1)²+8x的六次方y的三次方/2x的四次方y
越快越好
(xy+1)(xy-1)(x²y²+1)-(xy-1)²+8x的六次方y的三次方/2x的四次方y越快越好
原式=(x²y²-1)(x²y²+1)-(x²y²-2xy+1)+4x²y²
=x^4y^4-1-x²y²+2xy-1+4x²y²
=x^4y^4+3x²y²+2xy-4
整式乘法..1.3xy(x²y-xy²+xy)-xy²(2x²-xy+2x)2.(x-1)(x²-4x+3)-x(x²-5x+2)
(5x²y-2xy²-3xy)-(2xy+5x²y-2xy²),x=-1/5,y=-1/3
计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy
x³y³-x²y²-xy+1
X²+xy²-x²-y²-3xy+2x+2y-1分解因式
x²-xy+1/4y² 分解因式
1-x²+4xy-4y² 因式分解
(-3x²)·(1/3xy²)=
1-x²-9y²+6xy因式分解
(-3x²)·(1/3xy²)
(-3x²y)(1/3xy²)答案?
1 3x²+4xy-y²=2 4xy+1-4x²-y²=
76三1 合并多式项:5 ² x²y-5xy²- xy - -------- +x²y2 2
x²y²-x²y-xy²+x+y-1因式分解
6xy-3(3y²-(x²-2xy)+1) =
已知 (x+1)² +|y-1|=0,求 2(xy-xy²)-(3xy²-xy) 的值.
已知13x²-6xy+y²-4x+1=0 求(xy-x²)五次方
已知13x²-6xy+y²-4x+1=0,求(xy-x²)的5次方