Algebraeasy · Past Paper
The discriminant of x^2 + 5x + 7 = 0 is:
A-3
B3
C53
D25
✓ Correct Answer: A — -3
D = 5^2 - 4(1)(7) = 25 - 28 = -3.
Share this question
More from Algebra
- The sum of digits of a two-digit number is 12. The number obtained by interchanging the digits exceeds the given number by 18. Find the number.
- Solve: x + 6/x = 5.
- What is the degree of a quadratic equation?
- Find the roots of the equation x^2 - 16 = 0.
- If the roots of (b-c)x^2 + (c-a)x + (a-b) = 0 are equal, find the relation between a, b, c.