Question

If the lines represented by ax + 2hxy+by² = 0 represents a pair of perpendicular lines ip. A) h=0 B) a+b=0​

Answer 1

Explanation:

Equation of bisectors of angle between the pair of straight line ax2+2hxy+by2=0 is given by a−bx2−y2=hxy

⇒hx2−(a−b)xy−hy2=0

Here coefficient of x2+ coefficient of y2=h+(−h)=0

∴ above equation represent the pair of ⊥er lines

Hence choice (a) is correct.