Question

if one zero of the quadrat polynomial x square+3x+k is 2,then the value of k is​

Answer 1

Step-by-step explanation:

1

Secondary School Math 5 points

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

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tardymanchester

tardymanchester Ace

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

Answer 2

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