Algebraeasy · Past Paper
If one root of x^2 - 5x + k = 0 is 2, find k.
A6
B-6
C5
D2
✓ Correct Answer: A — 6
Substitute x=2: (2)^2 - 5(2) + k = 0 => 4 - 10 + k = 0 => k = 6.
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