Question

How do you solve 8n squared+4n-16= -n squared using the quadratic formula?

Answer 1

8n² + 4n - 16 = -n²
8n² + n² + 4n - 16 = -n² + n²
9n² + 4n - 16 = 0
n = -4 +/- √(4² - 4(9)(-16))
2(9)
n = -4 +/- √(16 + 576)
18
n = -4 +/- √(592)
18
n = -4 +/- 24.33
18
n = -4 + 24.33 n = -4 - 24.33
18 18
n = 20.33 n = -28.33
18 18
n = 1.1294 n = -1.57389