Question

The roots of $x < - 2$ are equal, then the value of p is.

• A. $x > 6$
• B. $- 6 < x < 2$
• C. $2 < x < 6$
• D. $- 2 < x < 6$

Answer 1

Answer: (C)

$2 < x < 6$

Answer 2

Roots of equation $x^{2} - 2x + 4 = 0$ are equal

$a(p + q)^{2} + 2bpq + c = 0$

⇒ $a(p + r)^{2} + 2bpr + c = 0$ $\Rightarrow 36 p ^ { 2 } = 16$ $p^{2} + \frac{c}{a}$.