Question

subtract.
\\((9h^{4} + 9h^{2} + 9) - 8h^{2}\\)

Explanation:

Step1: Remove parentheses

$9h^4 + 9h^2 + 9 - 8h^2$

Step2: Combine like terms (the $h^2$ terms)

$9h^4 + (9h^2 - 8h^2) + 9$
$9h^4 + h^2 + 9$

Answer:

$9h^4 + h^2 + 9$