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

Printable View

- May 5th 2012, 01:35 AMdavellew69solving a equation
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 - May 5th 2012, 01:55 AMbiffboyRe: solving a equation
- May 5th 2012, 06:47 AMBobtheBobRe: solving a equation
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 .