" 21"(a+b)^(3)-a-b

If a-b=4 and ab=21, find the value of a^(3)-b^(3)

a=1.21,b=2.12" ant "c=-3.33 ,,,,, a^(3)+b^(3)+c^(3)-3abc=

Prove that |[a,a^2,1+pa^3] , [b,b^2,1+pb^3] , [c,c^2,1+pc^3]|=(1+pabc)(a-b)(b-c)(c-a)

If omega ne 1 is a cube root of unity and a+b=21 , a^(3)+b^(3)=105 , then the value of (aomega^(2)+bomega)(aomega+bomega^(2)) is be equal to

If omega ne 1 is a cube root of unity and a+b=21 , a^(3)+b^(3)=105 , then the value of (aomega^(2)+bomega)(aomega+bomega^(2)) is be equal to

If omega ne 1 is a cube root of unity and a+b=21 , a^(3)+b^(3)=105 , then the value of (aomega^(2)+bomega)(aomega+bomega^(2)) is be equal to