Find the zero of the polynomial in the following case:
$p(t) = 7t - 21$

Evaluate using suitable identities: $(998)^{3}$

By using the factor theorem,show that $(x-3)$ is a factor of the polynomial $p(x) = 12x^3 - 31x^2 - 18x + 9$ and then factorise the polynomial.

Expand $(a - 2b + 7c)^2$.

The value of $249^{2}-248^{2}$ is

Classify the following as linear,quadratic,or cubic polynomial: $35x^{2} - 16x - 12$.