Verify whether the following are True or False:

$-3$ is a zero of $x-3$

Evaluate the following products without multiplying directly

$103 \times 105$

By using the factor theorem, show that $(x+2)$ is a factor of the polynomial $6 x^{3}+19 x^{2}+16 x+4$ and then factorise $6 x^{3}+19 x^{2}+16 x+4$

Without actually calculating the cubes, find the value of :

$(0.2)^{3}-(0.3)^{3}+(0.1)^{3}$

One of the zeroes of the polynomial $2 x^{2}+7 x-4$ is