Question

The equation of the bisectors of the angle between lines represented by equation $4x^2-16xy-7y^2=0$ is

• A. $8x^2+11xy-8y^2=0$
• B. $8x^2-11xy-8y^2=0$
• C. $16x^2+11xy-16y^2=0$
• D. $16x^2+11xy-16y^2=0$

Answer 1

The correct option is A

$8x^2+11xy-8y^2=0$

$\frac{x^2-y^2}{11}=\frac{xy}{-8}\Rightarrow 8x^2+11xy-8y^2=0$.