Question

Qual e o valor de x na P.G (x-40,x,x+200)

Answer 1

P.G (x-40,x,x+200)
 
   x      =   x + 200
x - 40           x

x² = (x - 40)(x + 200)

x² = x² + 200x  - 40x - 8000


x² - x² - 200x  + 40x = - 8000

- 160x = - 8000(-1)

160x = 8000

x = 8000
        160

x = 50