Question

Find the value of the algebraic expression

$2p^2+5q-3$ at $p=2,q=1$

Answer 1

The given expression is,

$2p^2+5q-3$

We need to find the value of the expression at $p=2,q=1$

$$\begin{gathered} \Rightarrow 2p^2+5q-3 \\ \Rightarrow 2\left(2^2\right)+5\left(1\right)-3 \\ \Rightarrow 2\left(4\right)+5\left(1\right)-3 \\ \Rightarrow 8+5-3 \\ \Rightarrow 10 \end{gathered}$$

Thus,

The value of the given expression $=10$