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

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- May 5th 2012, 12:35 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, 12:55 AMbiffboyRe: solving a equation
- May 5th 2012, 05:47 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 .