a-b=3,ab-3,则3a-3b-6ab=
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a-b=3,ab-3,则3a-3b-6ab=
a-b=3,ab-3,则3a-3b-6ab=
a-b=3,ab-3,则3a-3b-6ab=
3a-3b-6ab
=3(a-b)-6ab
=3×3-6×(-3)
=27
3a-3b-6ab=9+18=27
3(a-b)-6ab
=3×3-6×3
=9-18
=-9
若(a-b)²-6(a-b)+9=0,则b+3/a²-ab
已知a+b=-3,a^b+ab^=-30,则a^-ab+b^+11
1/a+1/b=3则a-ab+b/a+2ab+b值是?
实数a,b满足a*a*a+b*b*b+3ab=1,则a+b= ,
若a-b=5,ab=-6,求(a+b)(a+b)-3(a+b)(a-b)
a^3-ab^2 =a (a^2 -b^2) =a(a+b)(a-b)
-2ab乘以(-a^+6a^b-3a+b)
(a-b)^3-4ab(b-a)
(a-b)^3-4ab(b-a)
(a-b)3-4ab(b-a)
(a-b)^3+2ab(a-b)
ab/a+b=3 a-2ab+b/2a-3ab+2b?
规定一种新运算,a*b=a+b,a#b=a-b,其中,a,b为有理数,化简a²b*3ab+5a²b#4ab结果为 ( )A 6a²b+ab B -4a²b+7ab C 4a²b-7ab D 6a²b-ab
已知3a*a+ab-2b*b=0(a不等于0,b不等于0),求a/b-b/a-(a*a+b*b)/ab的值.
3a²b-6ab+b
(a+3b)(a*a-3ab+9b*b)-(a-3b)(a*a+3ab+9b*b)
已知a+b=3,ab=6,则a³b-2a²b²+ab³
a-b=3,ab-3,则3a-3b-6ab=