Question

n^2+2n-240 =0 find the value of n ?

Answer 1

Heya....!!!!

n² + 2n - 240 = 0

- B ± √ B2-4AC
n = ————————
2A

where,
A = 1
B = 2
C = -240

Accordingly,

B² - 4AC

=> 4 - (-960)

=> 964

Applying the quadratic formula :

-2 ± √ 964
n = ——————
2
-2 ± 2√41
=> n = ——————
2
- 2 ± 2×15.524
=> n = —————————
2
15.524 - 1
=> n = ————————
1

=> n = 14.524 , n = -16.525