Question

7 - 3[(n 3 + 8n) ÷ (-n) + 9n 2]

Answer 1

Answer:

2 (20 - 27 n)

Step-by-step explanation:

Simplify the following:

7 - 3 (9×2 n + (3 n + 8 n)/(-n))

3 n + 8 n = 11 n:

7 - 3 (9×2 n + (11 n)/(-n))

(11 n)/(-n) = n/n×11/(-1) = 11/(-1):

7 - 3 (9 2 n + 11/(-1))

Multiply numerator and denominator of 11/(-1) by -1:

7 - 3 (9 2 n + -11)

9×2 = 18:

7 - 3 (18 n - 11)

-3 (18 n - 11) = 33 - 54 n:

33 - 54 n + 7

Add like terms. 7 + 33 = 40:

40 - 54 n

Factor 2 out of 40 - 54 n:

Answer:  2 (20 - 27 n)