Question

if 2 is the zero of the polynomial p(x)=x2-kx+6,then k=?

Answer 1

A.T.Q
2*2 - k*2 + 6=0
4 + 6 - 2k= 0
10=2k
k=5

Answer 2

2 is the zero of the polynomial.
p(x)=x^2-kx+6
p(2)=0
2^2-k(2)+6=0
4-2k+6=0
10-2k=0
10=2k
10/2=k
5=k


therefore k =5

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