如果实数a,b满足a2+2ab+b2=12,a2-b2=4根号3,求a-b/b,
若实数a,b满足条件(a/b)+(b/a)=2,求(a2+ab+b2)/(a2+4ab+b2)的值
如果b分之a=2,求a2+b2分之a2-ab+b2
3a2+ab-2b2=0,求a/b-b/a-(a2+b2)/ab (a,b不等于0)
已知两实数ab满足条件a2-3ab+2b2=0,求a比b的值
已知实数a\b满足a2+ab+b2=3,a2-ab+b2=k,求k的取值范围.
如果实数a,b满足条件a2+b2=1,|1-2a+b|+2a+1=b2-a2,则a+b=______.
已知正数a,b满足2a2=b2=3,求a根号b2+1的最大值
“实数a,b满足a2+b2
已知A=a2-2ab+b2,B=-a2-3ab-b2,求:2A-3B.
已知A=a2-2ab+b2,B=a2-3ab-b2,求2A-3B
.已知A=a2-2ab+b2,B=a2+2ab+b2,求:2a-3b
已知实数a,b满足方程(a2+b2+5)(a2+b2-5)=0,则a2+b2=______