-2a^3b+8a²b²-8ab^3 (7x²+2y²)²-(2x&s
例如:a²+b²-c²-4d²-2ab+4cd x²+2xy+y&su
3a-3b/10ab*25a²b³/a²-b² x²-4y²
分解因式:9x²-16(a+b)² 1/2x⁴y²-1/8x²y
已知多项式A=x²+2y²-z²,B=-4x²+3y²+2z²
化简(a²-2ab+2b²)-(2a²-2ab-3ab²)
已知多项式A=x²+2y+z²,B=-4x²+3y²+2z²,且A+B
先化解:(a² -b² /a² -ab ) /a² +2ab+b² /
3a²+7ab+2b²
5a²-3a²+3(a²-b²)-2(5a²+2b²)怎么合
3y/2x+2y+2xy/x²+xy 2x/x²-64y²-1/x-8y (1/a+1/b
2(a²+b²)(a+b)²-(a²-b²)²
分式计算,(1)a²-4b²\3ab² × ab\a-2b (2)x²-x\x-