Question

MEDAL!!!


Which of the following equations have (has) only one integer solution?

1. x + 9x = 0
2. x^2 + 9x = 0
3. x^3 + 9x = 0

A. I only
B. II only
C. III only
D. I and III only
E. I, II, III only

Answer 1

@Nnesha

Answer 2

I chose E. Am I wrong?

Answer 3

actually, E is right

Answer 4

from what i see all of them is x=0

Answer 5

The order of the polynomial is a hint. 1st order equations can have at most one real solution. 2nd order at most 2 real solutions.