Question

6. If one zero of the quadratic
polynomial x² + 3x + k is 2, then the
value of k is
O 10
0-10
5​

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  

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

Hence f(2) = 0

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

Therefore, The value of k is -10.

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Answer 2

Step-by-step explanation:

here it's given that the value of x =2

then,

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

4+6+k=0

10+k=0

k=-10