Question

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

Answer 1

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$\large\red{\sf{Question:-}}$

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

$\large\red{\sf{Answer:-}}$

Since 2 is one of the zero of the polynomial

${x}^{2} + 3x + k$

Therefore, putting value of x = 2 in the above equation, we get,

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${2}^{2} + 3(2) + k$

=> 4 + 6+ k = 0

=> 10 + k = 0

=> k = -10.

Which is the required answer.

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Answer 2

Step-by-step explanation:

let x is 2

(2)2 + 3×2 + k =0

4 + 6 + k = 0

10 +k = 0

k =-10