Question

If $p=-2$, find the value of:$-3p^2+4p+7$

Answer 1

Compute the required value:

From the given data $p=-2$

On substituting the value of $p$ in the given algebraic equation and simplifying we get

$\begin{array}{rcl}(-3\times {(-2)}^2)+(4\times (-2\left)\right)+7& =& (-3\times 4)+(-8)+7\\ & =& -12–8+7\\ & =& -20+7\\ & =& -13\end{array}$

Hence the value of $3p^2+4p+7$ is $-13$.