Algebraeasy · Past Paper
Find the value of k for which x^2 - 4x + k = 0 has equal roots.
A2
B4
C-4
D16
✓ Correct Answer: B — 4
For equal roots, D = b^2 - 4ac = 0. (-4)^2 - 4(1)(k) = 0 → 16 = 4k → k = 4.
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✓ Correct Answer: B — 4
For equal roots, D = b^2 - 4ac = 0. (-4)^2 - 4(1)(k) = 0 → 16 = 4k → k = 4.
Share this question