If $p(3)=0$ for polynomial $p(x),$ state one factor of $p(x)$

By remainder Theorem find the remainder, when $p(x)$ is divided by $g(x),$ where

$p(x)=x^{3}-3 x^{2}+4 x+50, g(x)=x-3$

Classify the following as linear, quadratic or cubic polynomial

$4 x^{2}-49$

Find the value of the polynomial $3 x^{3}-4 x^{2}+7 x-5,$ when $x=-3$

The following expressions are polynomials? Justify your answer:

$1-\sqrt{5 x}$