Question

If $x=-3$, find the value of:
$x^3+1$

Answer 1

Let us substitute $x=-3$ in the given expression $x^3+1$ as shown below:

$x^3+1=(-3{)}^3+1=(-3\times -3\times -3)+1=-27+1=-26$

Hence, $x^3+1=-26$ if $x=-3$.