JEE Main 2019 Mathematics question
If one real root of the quadratic equation is cube of the other root, then a value of k is:
Answer: (B)
Solution
α = 256/81 ⇒ α = ±4/3; α + α = 100/27 = −k/81 ⇒ k = −300 (for α = 4/3).
If one real root of the quadratic equation is cube of the other root, then a value of k is:
α = 256/81 ⇒ α = ±4/3; α + α = 100/27 = −k/81 ⇒ k = −300 (for α = 4/3).