Question

add.
$(5a^{3} + 8a + 9) + (-4a^{3} + a - 8)$

Explanation:

Step1: Group like terms

$(5a^3 - 4a^3) + (8a + a) + (9 - 8)$

Step2: Combine $a^3$ terms

$5a^3 - 4a^3 = a^3$

Step3: Combine $a$ terms

$8a + a = 9a$

Step4: Combine constant terms

$9 - 8 = 1$

Step5: Sum all simplified terms

$a^3 + 9a + 1$

Answer:

$a^3 + 9a + 1$