CA Foundation P3 · Chapter 2 · Question 4 of 9
The roots of the equation 2x² + 5x + 4 = 0 are:
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: A) Imaginary (complex conjugates)
Explanation
The discriminant is b² − 4ac = 25 − 4(2)(4) = 25 − 32 = −7. Since the discriminant is negative, the roots are imaginary and occur as a conjugate pair.
More Equations MCQs
- Q6The solution of the simultaneous equations 3x + 4y = 26 and 5x − 2y = 13 is:
- Q7A cashier has ₹1,200 made up of 90 notes, some of ₹10 and the rest of ₹20. The number of ₹20 notes is:
- Q8One root of x³ − 6x² + 11x − 6 = 0 is 1. The other two roots are:
- Q9If α and β are the roots of x² − 5x + 3 = 0, the equation whose roots are α² and β² is:
- Q1The solution of the equation 5x − 7 = 3x + 11 is: