a2-1/a2+a-2÷(1+1/a2+2a)化简
(a+1)2+a2+(a2+a)2因式分解
(a2+a+1)(a2+a+2)-12因式分解
(a2-1)/(a2+2a+1)除以(a2-a)/(a+1) (a-2/(a+3)除以(a2-4)/(a2+6a+9)
[1-(6+3a)/(a2+4a+4)]÷[(4a-4)/(a2+2a)]
(a-1)-(3a2-2a+1)
化简 (2a2-1+2a)-3(a-1+a2)
(a2-a)a2-2a-3÷a(a-3)=a(a-1)(a+1)(a
已知实数a满足a2+2a-1=0求(1 /a+1)-(a+3/a2-1)*(a2-2a+1/a2+4a+3)的值
化简:5a2-[a2+(5a2-2a)-2(a2-3a)].
=IF(COUNTIF($A$1:A2,A2)>0,COUNTIF($A$1:A2,A2))
设a=根号3-3,求[(a+1/a2-a)+(4/1-a2)]除以(a2+2a-3/a2+3a)的值
已知A2次方-2A+1=0,求A+A/1与A2次方+A2次方/1的值