The zero of the linear polynomial $p(x) = 3x - 6$ is $\ldots$

Obtain the value of the following polynomial at the given value of $x$: $p(x) = 2x^4 - x^2 + 5x - 8$ at $x = -3$.

Which of the following is a quadratic polynomial?

The graph of a linear polynomial is a $\ldots \ldots \ldots . . . .$

Are the following statements 'True' or 'False'? Justify your answers.
If all three zeroes of a cubic polynomial $x^{3}+ax^{2}-bx+c$ are positive,then at least one of $a, b$ and $c$ is non-negative.

The zeroes of the quadratic polynomial $x^{2}+kx+k, k \neq 0,$