Algebraeasy · Past Paper
In the equation x^2 - kx + 4 = 0, if the sum of roots is 5, find k.
A4
B5
C-5
D2
✓ Correct Answer: B — 5
Sum of roots = -b/a = -(-k)/1 = k. Given sum is 5, so k = 5.
Share this question
More from Algebra
- Which of the following is a constant polynomial?
- A part of monthly hostel charges is fixed and the remaining depends on the number of days one has taken food in the mess. Student A takes food for 20 days and pays Rs 1000. Student B takes food for 26 days and pays Rs 1180. Find the fixed charge.
- Factorize: a^3 + b^3 + c^3 - 3abc.
- The zeros of P(x) = x^2 - 3x are:
- Subtract (x - 5) from (2x + 3).