Question

What is the value of the expression below when n = 5? 2−n^2+3⋅14−n^2

Answer 1

-6

Explanation:

Evaluate -n^2 - n^2 + 2 + 3 14 where n = 5:

-n^2 - n^2 + 2 + 3 14 = 2 - 5^2 + 3×14 - 5^2

5^2 = 25:

2 - 25 + 3×14 - 5^2

5^2 = 25:

2 - 25 + 3×14 - 25

3×14 = 42:

2 - 25 + 42 - 25

2 - 25 + 42 - 25 = (2 + 42) - (25 + 25):

(2 + 42) - (25 + 25)

2 + 42 = 44:

44 - (25 + 25)

| 1 |

| 2 | 5

+ | 2 | 5

| 5 | 0:

44 - 50

44 - 50 = -(50 - 44):

-(50 - 44)

| 4 | 10

| 5 | 0

- | 4 | 4

| 0 | 6:

Answer: -6