Question

evaluate the expression when $c = 5$. $c^{2}-18$

Explanation:

Step1: Substitute c value

Substitute $c = 5$ into $c^{2}-18$. So we get $5^{2}-18$.

Step2: Calculate the square

Calculate $5^{2}=25$. Then the expression becomes $25 - 18$.

Step3: Subtract

$25-18 = 7$.

Answer:

7