Question

find joint equations of lines 2x+5y=0 and 3x-y+1=0 ​

Answer 1

Answer:

2x+y=0 & 3x−5y=0

(2x+y)×(3x−5y)=0

6x

2

−10xy+3xy−5y

2

=0

6x

2

−5xy+7xy=0

∴ Joint equation is

6x

2

−5y

2

+7xy=0.