Algebraeasy · Past Paper

The value of k for which x^2 - 4x + k = 0 has equal roots is:

A2
B4
C-4
D16

✓ Correct Answer: B4

For equal roots, D = 0. (-4)^2 - 4(1)(k) = 0 => 16 - 4k = 0 => k = 4.

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