- 7^3 means?

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W^44 + w^45 = ? Options : A)-1 B)-1/w C) 1/(-w^2) or none.
I know that w^3 = 1 the answer is c...how? I want to login again? How do i confirmed the identity of a person saw over the internet? 250,000 divided by 10? If a and b are roots of equation x^2 +x -12 =0 such that a>b then equation whose roots are 2a and 3b is ?Please!?