Write the coefficient of $x^2$ in the following polynomial: $1-x^2$

The graph of linear polynomial $p\left(x\right)=5x+3, x\in R$ is _____.

Consider the following two statements
$\mathrm{I}$. Any pair of consistent liner equations in two variables must have a unique solution.
$\mathrm{II}$. There do not exist two consecutive integers, the sum of whose squares is $365$ .

Then

If $\mathrm{P}\left(\mathrm{x}\right) =2{\mathrm{x}}^3+3{\mathrm{x}}^2-11\mathrm{x}+6$, then find the value of$\mathrm{P}\left(1\right)$.

Solve : $x^4+4=0$.

Find all other zeros of $2x^4-3x^2+6x-2,$ if you know that two of its zeros are $\sqrt{2} \& -\sqrt{2}$.

Write the degree of the polynomial $f\left(x\right)=x^2-3x^3+2$

If one of the zeroes of the quadratic polynomial $x^2+3x+k$ is $2$, then find the value of $k$ is