Home » GMAT » Which of the following equations Don’t have the root X as one of their roots?
If X is a root of the equation a3 +8a2 20a, than which of the following equations Don’t have the root X as one of their roots?
A. X3 + 4X2 32X.
B. X2 + 18X + 80.
C. X2 12X + 20.
D. X2 + 5X 14.
E. X2 + 10X + 16.
Correct Answer: E
Explanation/Reference:
Explanation:
The original equation is a3 +8a2 20a, it can be written as a(a 2)(X + 10). The roots are 2,0 and (-10).
We are looking for an equation that has none of the same roots. Answer E: X2 10X +16 = (X + 2)(X + 8) This equation has none of the original roots. All the other answers have one or more of the same original roots.
|
Download Printable PDF. VALID exam to help you PASS.
|
 |
