Question

Sey answer step by step ​

Answer 1

Answer:

$k = 12$

Step-by-step explanation:

Given ----->

$P(x) = 3y^{2} + ky + 12 = 0$

a = 3

b = k

c = 12

it is given that roots of P(x) are real and equal

so,

⇒ $b^{2} - 4ac = 0$

⇒ $(k)^{2} - 4(3)(12)$

⇒ $k^{2} = 144$

⇒ $k = 12$  $(ans)$

hope it will help you.