Question

if one zero of the quadratic polynomial x2 +3x +k is 2 then find the value of k

Answer 1

Hope it helps you.....

Answer 2

Answer:

The value of k is -10      

Step-by-step explanation:

Given : Quadratic polynomial $x^2+3x+k$

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.