Symbol
Problem
Use a suitable identity to get each of the following products. $a\right)$ $\left(p-11\right)\left(p+11\right)$ b) $\left(2y+5\right)$ $\left(2y-5\right)$ $c\right)$ $\left(12a-9\right)\left(12a+9\right)$ d) $\left(2a-1/2\right)\left(2a-1/2\right)$ $e\right)$ $\left(2.5x-0.5y\right)\left(2.5x-0.5y\right)$ $1\right)$ $\left(a^{2}+b^{2}\right)\left(-a^{2}+b^{2}\right)$ h) $\right)$ $\left(6x+5y\right)^{2}$ $g\right)$ $\left(6x-7\right)\left(6x+7\right)$