若 a^2+2ab+2b^2-6b+9=0,求a^b的值

若a/b=2 则a*a-ab+b*b/a*a+b*b等于? （a+ab)-[(ab-2b)-a]-(-9ab),其中a+b=-7,ab=3. 若a/b=2,求分式a*a+ab-b*b/a*a-2ab+2b*b 若a+b=3,ab=-2,求(5a-5b-ab)-(4a-6b-3ab) 若ab^2=-6,则-ab(a^2b^5-ab^3-b)=? 急.如果a*a-ab=9,ab-b*b=4.求a*a-b*b和a*a-2ab+b*b的值 (9a²-6ab+b²)/(3a²-ab),其中b/a=2 a^2b(a-b)-6ab(b-a), a+b/2ab 2AB/A+B a+b/2ab 4ab/b^2(a-b)= 若a^2-ab=9,ab+b^2=6,则a^2+b^2=（）,a^2-2ab-b^2=（）, 若a^2-ab=9,ab-b^2=6,则a^2-b^2=____,a^2-2ab+b^2=____. 若a+b=5,ab=6则-2a^2b-2ab^2 若a²-ab=9,ab-b=6,则a²-b²=_ a²-2ab+b²=_. a/b=2 ,(a*a-ab+b*b)/(a*a+b*b)= 若a-b=6,ab=7,则ab^2-a^2b