JEE Main 202228 JulyEvening Shift
- Exam
- JEE Main
- Year
- 2022
- Date
- 28 July
- Shift
- Evening Shift
- Subject
- Mathematics
- Chapter
- Quadratic Equation
JEE Main 2022 · 28 July · Evening Shift · Mathematics · Quadratic Equation
Let α, β be the roots of the equation x ^ 2 - 2 x + 6 = 0 and 1 α ^...
Let be the roots of the equation and be the roots of the equation . Then the roots of the equation are :
Options
- Anon-real complex numbers
- Breal and both negative
- Creal and both positive
- Dreal and exactly one of them is positive
Correct answer
B. real and both negative
Step-by-step solution
Given be the roots of the equation
So sum of roots will be and product of roots will be
And also given and are roots of
So sum of roots will be
And similarly product of roots will be,
Now adding equation \left(1\right) \text{ and } \left(2\right)a + b = \dfrac{1}{{\left(\alpha\beta\right)}^{2}} - 1 = \dfrac{1}{6} - 1 = - \dfrac{5}{6}
Now putting the value of in
⇒ x = - \dfrac{7}{3}, x = - \dfrac{1}{2} are the roots, both roots are real and negative.