how to solve T(n)=2T(n/2)−n^3n with master theorem

Question

how do i apply master theorem to this?
 

T(n)=2T(n/2)−n^3n

Comments

you can’t apply masters theorem on this .

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because of the minus right?

it is not in the form of  $aT(\frac{n}{b}) + \Theta (n^{k}log_{n}^{p})$

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yes

Answer 1

We cannot apply master theoram here. To apply master theoram the recurrence relation should be in the form:

T(n) = aT(n/b) + f(n)

Answer 2

We can not apply the Master theorem for the above-given recurrence relation T(n) = 2T(n/2)−n^3n  because it should follow T(n)=aT(n/b)+f(n) format where a>=1,b>1,k>=0 and p should be real number.