a³ + ka + 10 = 0 solution is 2, but what is the value of k?

Question: a³ + ka + 10 = 0 solution is 2, but what is the value of k?

Solution:
∵ একটি সমাধান = 2

a = 2 বসিয়ে পাই,
2³ + 2k + 10 = 0
⇒ 8 + 2k + 10 = 0
⇒ 2k = - 18
⇒ k = (- 18)/2
∴ k = - 9

∴ k এর মান - 9.