Answer :
c² - 5c - 24 = 0
c = -(-5) +/- √((-5)² - 4(1)(-24))
2(1)
c = 5 +/- √(25 + 96)
2
c = 5 +/- √(121)
2
c = 5 +/- 11
2
c = 5 + 11 c = 5 - 11
2 2
c = 16 c = -6
2 2
c = 8 c = -3
c = -(-5) +/- √((-5)² - 4(1)(-24))
2(1)
c = 5 +/- √(25 + 96)
2
c = 5 +/- √(121)
2
c = 5 +/- 11
2
c = 5 + 11 c = 5 - 11
2 2
c = 16 c = -6
2 2
c = 8 c = -3