Question

If one zero of the quadratic polynomial x*x+3x+k is 2 , then the value of k is



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Answer 1

Answer:

put x=2

(2)2 + 3(2) + k =0

4+6+k=0

k=-10

Answer 2

Answer:

K = -10

Step by Step explanation:

Let the given quadratic polynomial be f(x) = x^2 + 3x +k

Given one of the zero of the quadratic polynomial is 2.

Hence f(2) = 0

Put x = 2 in f(x), we get

f(2) = 2^2 + 3(2) +k

0 = 4+6+k

0 = 10 + k

k = -10

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