Question

Find the sum and Express it in simplest form. (-8n^3 + 4n - 8) + (7n^3 - 2n + 6)
Please Help !​

Answer 1

n^3 + 2n -2

Explanation:

Remove the parentheses and simplify:

-8n^3 + 4n - 8 + 7n^3 - 2n + 6

n^3 + 2n -2.

Answer 2

Explanation:

We have to add the like terms. Like terms are with variables of same power.

-8n³ and 7n³ are like terms , now add the coefficient of n³ , -8 + 7 = -1

-8n³ + 7n³ = -1n³

(-8n³ + 4n - 8) + (7n³ - 2n + 6 )

Combine like terms

= -8n³ + 7n³ + 4n - 2n - 8 + 6

= -1n³ + 2n - 2