1.12345*12345+7655*7655+24690*76552.已知a*a-a=3,b*b-b=3,且a不等于b,试求a-b的值3.已知a,b满足等式x=a*a+b*b+20,y=4（2b-a),则x,y的大小关系是?4.已知x,y满足x*x+y*y+5/4=2x+y,求代数式xy/x+y的值

1.12345*12345+7655*7655+24690*76552.已知a*a-a=3,b*b-b=3,且a不等于b,试求a-b的值3.已知a,b满足等式x=a*a+b*b+20,y=4（2b-a),则x,y的大小关系是?4.已知x,y满足x*x+y*y+5/4=2x+y,求代数式xy/x+y的值 12345 12345 12345 12345: 12345 1.2345^2+0.7655^2+2.469X0.7655 12345*12345-12345*0 1.1+1.12+1.123+1.1234+1.12345+1.123456+1.1234567+1.12345678+1.123456789= YT28凿岩机和7655凿岩机有什么区别 1.2345^2+0.7655^2+2.469x0.7655=? 12345-12345等于? 12345*12345=? 12345-12345= 12345+12345=? 12345加12345 12345＋12345－12345×12345÷12345＝? 数学图形加法题：*%6@加*2*7加5*4@等于12345*%6@+*2*7+5*4@=12345*=（）%=（）@=（）