Find the co-ordinates of the point of intersection between the line y=5-x and the curve xy=-4.
so far , i substituted y=5-x into the equation xy=-4 to get: -x^2+5x+4=0
then i completed the square since i couldnt factorise that. and the x cordinate from the completing the square was 5/2. what do i do after this to find the points of intersection?