solve the following pair of linear equations graphically: x+y+1=0,2x-y-4=0. also shade the triangular region formed by these lines obtained and x-axis.
to draw the straight line x+y+1=0,
the points are (-1, 0) and (0, -1). plot these points and join them. that will be the required equation.
to draw the straight line 2x-y-4=0.
the points are (2, 0 ) and (0, -4). plot these points and join them, that will be the required equation.
thus from the graph it is clear that the intersection point is A(1, -2).
thus x =1 and y = -2 is the solution of the given set of linear equations.
ABC is the required shaded region.
hope this helps you.
cheers!!