An operator product inequalities for polynomials

Abstract

Let $P(z)$ be a polynomial of degree $n\geq 1$. In this paper we define an operator $B$, as following, $$B[P(z)]:=\lambda_0 P(z)+\lambda_1 (\frac{nz}{2}) \frac{P'(z)}{1!}+\lambda_2 (\frac{nz}{2})^2 \frac{P''(z)}{2!},$$ where $\lambda_0,\lambda_1$ and $\lambda_2$ are such that all the zeros of $$u(z)=\lambda_0 +c(n,1)\lambda_1 z+c(n,2) \lambda_2 z^2$$ lie in half plane $$|z|\leq |z-\frac{n}{2}|$$ and obtain a new generalization of some well-known results.