Question

1. $3a - 8 + 6 - 4a + 5a^{2}$

Explanation:

Step1: Group like terms

$5a^2 + (3a - 4a) + (-8 + 6)$

Step2: Combine like terms

$5a^2 + (-a) + (-2)$

Step3: Simplify signs

$5a^2 - a - 2$

Answer:

$5a^2 - a - 2$