Question

if x=2 is the zero of a polynomial x^2+3x+k, find the value of k ​

Answer 1

Answer:

k= -10

Step-by-step explanation:

x^2+3x+k=0

=>2^2+3×2+k=0

=>4+6+k=0

=>10+k=0

=>k= -10

Answer 2

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The polynomial is...

${x}^{2} + 3x + k = 0$

To find the value of 'k', we will put the value of 'x' in the polynomial.

${(2)}^{2} + 3(2) + k = 0$

$4 + 6 + k = 0$

$10 + k = 0$

Hence, the answer is...

$k = - 10$

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