若一个有理数a满足条件a<0,且a2=225,则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=______.
如果实数a,b满足条件a2+b2=1,|1-2a+b|+2a+1=b2-a2,则a+b=______.
已知有理数a,b,c满足下列条件:a+b+c=0,且abc
已知a、b实数且满足(a2+b2)2-(a2+b2)-6=0,则a2+b2的值为______.
若实数a满足a2-2a=3,则3a2-6a-8的值为______.
设x=a2b2+5,y=2ab-a2-4a,若x>y,则实数a、b满足的条件是______.
三个有理数a,b,c满足a:b:c=2:3:5,且a2+b2+c2=abc,则a+b+c= ___ .
有一个自然数a,满足a2=1993×1994×1995×1996+1,则a=______.
已知a,b均为质数,且满足a2+ba=13,则ab+b2=______.
若a,b都是有理数,且a2-2ab+2b2+4a+8=0,则ab=( )
若a=0,且b分之a=0,则b满足条件是什么