-4
-2
2
4
Correct answer is D
An equation can be written as \(x^{2} - (\alpha + \beta)x + (\alpha\beta) = 0\)
Making the coefficient of \(x^{2}\) = 1 in the given equation, we have
\(x^{2} + \frac{5}{2}x + \frac{n}{2} = 0\)
Comparing, we have \(\alpha\beta = \frac{n}{2} = 2 \implies n = 4\)
If \(f(x) = \frac{4}{x} - 1, x \neq 0\), find \(f^{-1}(7)\)....
Which of the following quadratic curves will not intersect with the x- axis? ...
If \(\frac{6x + k}{2x^2 + 7x - 15}\) = \(\frac{4}{x + 5} - \frac{2}{2x - 3}\). Find the value ...
If \(Px^{2} + (P+1)x + P = 0\) has equal roots, find the values of P....
Calculate, correct to one decimal place, the angle between 5i + 12j and -2i + 3j. ...