Question

if one zero of the quadratic polynomial x^2 +3x+k is 2 then rhe value of k is​

Answer 1

Answer:

The value of k is -10      

Step-by-step explanation:

Given : Quadratic polynomial  

One of the root is 2

To find : The value of k

Solution :

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

$f(2)=2^{2}+3(2)+k$

$0=4+6+k$

$0=10+k$

$k=-10$

Therefore, The value of k is -10.

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