Solving quadratics/Simultaneous eq - extension

In this notebook file are a selection of increasingly difficult questions all resulting in having to solve quadratics which (luckily) factorise whilst keeping the problem itself challenging. My year 9 top set have solved all of these and can vouch for their difficulty, most have lasted a lesson and required a write up. This will really test their algebraic manipulation and ideas about solving simultaneous equations. Useful for year 9 through to year 11 I would suspect.