First slide

Pair of straight lines

Question

The triangle formed by the pair of lines $2 x^{2} + 4 xy + 2 y^{2} = 0$ and the line $x + 2 y + 3 = 0$ is

Moderate

A

Equilateral
B

Isosceles
C

Right-angled
D

Does not exist

Solution

The given equation is $2 x^{2} + 4 xy + y^{2} = 0$
Observing the equation $a = 2, h = 2, b = 2$
It implies $h^{2} = ab$
The pair of lines represent coincide lines. Then triangle does not exist.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App