Answer:
x = 4 or x = -5
Step-by-step explanation:
Solve for x over the real numbers:
3 (x - 4) (x + 5) = 0
Divide both sides by 3:
(x - 4) (x + 5) = 0
Split into two equations:
x - 4 = 0 or x + 5 = 0
Add 4 to both sides:
x = 4 or x + 5 = 0
Subtract 5 from both sides:
Answer: x = 4 or x = -5
