已知全集U={2,0,3-a2},P={2,a2-a-2},若∁UP={-1},则实数a=______.
已知全集U={2,3,a2-a-1 },A={2,3},若CUA={1},则实数a的值是______.
全集U={2,3,a2+2a-3 },A={|a+7|,2},CUA={5},则实数a=______.
若实数a满足a2-2a-1=0,则3a2-6a+5=______.
若实数a满足a2-2a+1=0,则2a2-4a+5=______.
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
若实数a满足a2-2a=3,则3a2-6a-8的值为______.
已知a2+a-1=0,则a3+2a2+2007的值为______.
以知全集U={2,4,1-a},A={-1},CuA={2,a2-a+2},则实数a=_________
已知a、b实数且满足(a2+b2)2-(a2+b2)-6=0,则a2+b2的值为______.
设全集是数集U={2,3,a2+2a-3},已知A={2,b},∁UA={5},求实数a,b的值.
已知a2+2a+1=0,则2a2+4a-3的值为______.
若3a2-a-2=0,则5+2a-6a2=______.