Question

Subtract -7a^2+3a-9−7a

Answer 1

You will subtract these top 2
$- 7 {a}^{2} + 3a - 9 - 7 {a}^{2} + 3a - 9$

$5 {a}^{2} - 6a - 45 {a}^{2} - 6a - 4$
and this bottom one is your ANSWER

$- 12 {a}^{2} - 110a - 22$