Respuesta :

chetankachana

Answer:

x = -5/2, -1, 1

Step-by-step explanation:

Step 1: Factor

  • 2x³ + 5x² - 2x - 5
  • (2x + 5)x² - 2x - 5
  • (2x + 5)(x - 1)(x + 1)

Step 2: Replace y with 0

"f(x)" is the same as "y = "

  • 0 = (2x + 5)(x - 1)(x + 1)
  • Case 1: (5 + 2x) = 0
  • 5 + 2x = 0
  • 2x = -5
  • x = -5/2
  1. Case 2: (x - 1) = 0
  • x - 1 = 0
  • x = 1
  1. Case 3: (x + 1) = 0
  • x + 1 = 0
  • x = -1

-Chetan K