The separate equations of the lines represented by $4 x^{2}-y^{2}+2 x+y=0$ are

The separate equations of the lines represented by $4 x^{2}-y^{2}+2 x+y=0$ are
  1. $2 x-2 y+1=0 \quad, x+2 y=0$
  2. $2 x-y+1=0 \quad, 2 x+y=0$
  3. $2 x-y+1=0 \quad, 2 x-y=0$
  4. $2 x-y=0 \quad, 2 x+y+1=0$

Solution

$\begin{array}{l} 4 x^{2}-y^{2}+2 x+y=0 \\ (2 x+y)(2 x-y)+(2 x+y)=0 \\ (2 x+y)(2 x-y+1)=0 \end{array}$

Asked in: MHT CET 2020 (19 Oct Shift 1)

Practice more Pair of Lines questions on Aicharya