Question

For what value of k will the equation $a,bc$ have equal roots?

• A. 5
• B. 9
• C. Both (1) and (2)
• D. 0

Answer 1

Answer: (C)

Both (1) and (2)

Answer 2

For the equation to be real roots,

$(a + b + c)^{2}$

⇒ $b^{2} - 4ac$

⇒ $b^{2} - 2ac$

⇒ $2b^{2} - ac$ ⇒ $ax^{2} + 2bx + c = 0$ = 0

$px^{2} + 2qx + r = 0$or $\frac{b}{ac} = \frac{q}{pr}$.