Final answer to the problem
$\left(a+9\right)^2-2a-18$
Got another answer? Verify it here!
Step-by-step Solution
Specify the solving method
1
Solve the product $-2\left(a+9\right)$
$\left(a+9\right)^2-2a-2\cdot 9$
2
Multiply $-2$ times $9$
$\left(a+9\right)^2-2a-18$
Final answer to the problem
$\left(a+9\right)^2-2a-18$