Substituting t = x²: t = 1 or 4 → x = ±1, ±2 → 4 real roots.
Back to JEE Advanced 2026 Algebra
JEE Advanced 2026 — Mathematics Algebra
medium
mcq
2026
Official previous-year question
Verified 30 May 2026.
Question
The number of real roots of the equation x⁴ - 5x² + 4 = 0 is:
Options
- A
0
- B
2
- C
4
- D
1
Solution
Did you get this right?
Sign in to track your attempts and accuracy.
Your note
Sign in to keep a private note on this question. Nothing you write is ever public.