Question

If one zero of the polynomial x^2-4x+k is 2,then find the value of k.

Answer 1

K=4....
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Answer 2

Let p(x) =x²-4x+k
Since 2 is the zero of p(x)
So p(2)=0
2²-4(2)+k=0
4-8+k=0
k=4