计算6a2−2ab−2(3a2+12ab)所得结果是( )
已知代数式3a2+(4ab-a2)-2(a2+2ab-b2).
化简a2-b2ab-ab-b2ab-a2的最后结果是( )
计算a2-(a-3)2,正确的结果是( )
分解1-a2-b2+2ab,其结果是______.
-2(ab-3a2)-[2b2-(5ab+a2)+2ab]
计算:(3a2+2a+1)-(2a2+3a-5)的结果是( )
(3a2-3ab+2b2)+(a2+4ab-2b2)=4a2+ab+b2
计算:(a2+ab+b2)(a2-ab+b2).
计算:a2-2ab/-ab+b2÷(a2/a-b÷2ab/2b-a)
(2002•武汉)化简ab−ba−a2+b2ab的结果是( )
初二分式计算[(a2+b2-c2+2ab)/( a2+b2-c2-2ab)]×[ (a2-b2-c2-2ab)/ ( a
化简:a2-3ab+4b2-(2b2-3ab-3a2)=______.