Question

If $a=-10$, evaluate :

ii) $a^2+8a$

Answer 1

Step: Evaluate

Given: $a^2+8a$
Substituting $a=-10$ in the given expression
$a^2+8a=(-10{)}^2+8\times (-10)$
$=100-80$
$=20$

Hence, the value of $a^2+8a$ for $a=-10$ is $20$.