Question

How do you solve `5n^2-7=488`?

Answer 1

`color(brown)(n = +- 3 sqrt11`

Explanation:

`5n^2 - 7 = 488`

`5n^2 = 495`

`n^2 = 495 / 5 = 99`

`color(brown)(n = +- sqrt99 = +- 3 sqrt11`