Question

one of the root of the equation x^2-4x+k=0 is 2 .then find k

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Answer 1

$p(x) = x^{2} - 4x + k = 0 \\ x = 2 \\ p(2) = 4 - 8 + k = 0 \\ p(2) = k = 4$

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Answer 2

Answer:

4

Step-by-step explanation:

given

p(x) = x^2-4x+k=0

where

p(2) = 0

so

2^2 - 2*4 + k = 0

k = 4