Question

For what value of k, is 5 a zero of the polynomial 2x2 + x +k?​

Answer 1

Answer:

Zero polynomial is 5

2x² + x + k = 0

2(5)² + 5 + k = 0

50 +5 + k = 0

•°• k = -55 ....is a answer of this

Answer 2

GivEn polynomial :

• 2x²+x+k

To finD :

• Value of k in polynomial if zeros of polynomial is 5.

Solution :

Here, P(x) = 2x²+x+k

Where, value of x = 5 . •••••[because 5 is zeros of polynomial]

Putting x = 5 :-

P(x) = 2x²+x+k

=> 2×(5)² + 5 + k = 0

=> 2× 25 + 5 + k = 0

=> 50 + 5 + k = 0

=> 55 + k = 0

=> k = 0 - 55

=> k = -55

Hence,

$\small{\boxed{\underline{\sf{If ~5~ is~ zeros~ of~ polynomial~ then~ k =~ -55}}}}$