Senior high school mathematics book (version A of PEP) requires 2 pages 1 15 10. Urgent!

Solution: One of the edges is parallel to the known edge, so his equation is x+3y+b=0.

The distance from m to the known straight line is (/- 1-5/)/ root number 10.

The distance from m to the straight line is (/- 1-5/)/ root number 10.

So (/- 1+b/)/ number of radicals 10=(/- 1-5/)/ number of radicals 10.

So b=7.

So his equation is x+3y+7=0.

The other two are perpendicular to the known straight line, so the equations are 3x-y+k=0 respectively.

The distance from m to them is (/-3+k/) root number 10=(/- 1-5/)/ root number 10.

So k=-3 or 9.

So their equations are 3x-y+9=0, 3x-y-3=0.