Question

Resolva a equação
×!/(×-2)!=30

Answer 1

Vamos là.

x!/(x - 2)! = 30

x*(x - 1) = 30

x² - x = 30

x² - x + 1/4 = 30 + 1/4

(x - 1/2)² = 121/4

x1 - 1/2 = 11/2

x1 = 6

x2 - 1/2 = -11/2

x2 = -5