Math, asked by akshita755, 1 year ago

for what value of k is 3 a zero of the polynomial 2x^2+x+kx​

Answers

Answered by Prashantking753
7

Answer:

Step-by-step explanation:

putting x=3 and equating with 0 we will get the answer

here's the solution

2*3*3 +3+k3=0

18+3+k3=0

k3= -21

k= -7


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Answered by pinquancaro
5

The value of k is -21.

Step-by-step explanation:

Given : Polynomial 2x^2+x+k

To find : For what value of k is 3 a zero of the polynomial ?

Solution :

Polynomial 2x^2+x+k

Suppose, 3 is zero of polynomial for some value of k,

Then 2x^2+ x + k = 0

Put x=3 in the equation,

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

18+3+ k = 0

21+ k = 0

k=-21

Therefore, the value of k is -21.

#Learn more

If the sum of the zeros ofthe polynomial 5x^2-(3+k)x+7 is zero , then find the zeros of the polynomial 2x^2 -2(k+11)x +30

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