hi would I solve equations such as
y=-3x+2
and
y=2x^2-7x-4
by factorising or using the quad formula, as I need to find where the above intersect on a graph.
Many thanks
Dave
This is just a simple simultaneous equation. There will of course be 2 intersection points. is a parabola and will intersect it at 2 points.
as then
Therefore,
This is a quadratic, so factorise this equation and it will give you two points for . Put these back into the equation, and you will retrive the values for .