[(a+b)²/(a-b)²] X (2a-2b)/(3a+3b) - a²/(a&sup
2(a²+b²)(a+b)²-(a²-b²)²
5a²-3a²+3(a²-b²)-2(5a²+2b²)怎么合
已知14(a²+b²+c²)=(a +2b+3c)²求ac/(3b/2)&sup
2(a²b+3ab²)-3(a²b-1)-2a²b-2
若a²+b²+c²=10,则代数式(a-b)²+(b-c)²+(c-a)&sup
先化简再求值(a-b/a+b)+(a+b/a-b)-(2a²-2b²/a²+b²
先化解:(a² -b² /a² -ab ) /a² +2ab+b² /
x⁴-a²x²-b²x²+a²b²
3a-3b/10ab*25a²b³/a²-b² x²-4y²
已知a+b=-2,ab =-3,求a(a²-b²)-a(a²+b²)²
用柯西不等式证明实数a,b,c,d满足a+b+c+d=3a²+2b²+3c²+6d&sup
a-b+2b²/a+b