(1)已知:a-b+2=0,ab=3,求a^b-4a-ab^+4b的值;(2)已知a+b=1,ab=108,求a^b+ab^的值;
热心网友
:a^b-4a-ab^+4b=ab(a-b)-4(a-b)=(a-b)(ab-4)=-2(3-4)=2:a^b+ab^=ab(a+b)=108
(1)已知:a-b+2=0,ab=3,求a^b-4a-ab^+4b的值;(2)已知a+b=1,ab=108,求a^b+ab^的值;
:a^b-4a-ab^+4b=ab(a-b)-4(a-b)=(a-b)(ab-4)=-2(3-4)=2:a^b+ab^=ab(a+b)=108