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AP EAMCET · Maths · Pair of Lines

If the line y=mx is one of the bisectors of x2+4xy-y2=0, then value of 2m=

  1. A -1+5
  2. B 1+5
  3. C -1-51
  4. D 1-51
Verified Solution

Answer & Solution

Correct Answer

(A) -1+5

Step-by-step Solution

Detailed explanation

Given: x2+4xy-y2=0 This is the equation of pair of straight lines so comparing it with ax2+2hxy+by2=0 we get, a=1, b=-1, h=2 As we know the equation of the bisector is given by, x2-y2a-b=xyh ⇒x2-y21--1=xy2 ⇒x2-xy-y2=0 As y=mx is one of the bisector…