若a2+ab=4,ab+b2=-1,则a2-b2=______,a2+2ab+b2=______.
若a2+ab=4,ab+b2=-1,则a2-b2=______,a2+2ab+b2=______.
若a2+ab=5,ab+b2=4,则a2+2ab+b2的值为______.
化简:a2-3ab+4b2-(2b2-3ab-3a2)=______.
已知a2-ab=8,ab-b2=-4,则a2-b2=______,a2-2ab+b2=______.
已知a2-ab=15,ab-b2=-10,则代数式a2-b2=______.
若a2+2b2=5,则多项式(3a2-2ab+b2)-(a2-2ab-3b2)的值是______.
(3a2-3ab+2b2)+(a2+4ab-2b2)=4a2+ab+b2
若a2+b2=6,则式子(3a2-2ab-b2)-(a2-2ab-3b3)=______.
已知a2b2+a2+b2+1=4ab,则a=______,b=______.
若a+b=4,则a2+2ab+b2的值为______.
若2a2-2ab+b2+4a+4=0,则a2+b2=
如果a2+ab=20,b2-ab=-13,求a2+b2与a2+2ab-b2的值.