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
- Case 2: (x - 1) = 0
- Case 3: (x + 1) = 0
-Chetan K
