More Mistakes

A challenging exercise #aamt2017 pic.twitter.com/xLWS9x8SNV

— Cass Lowry (@cass_lowry) 11 July 2017

Another problem, some more mistakes...

I first did this on Geogebra:



Oooh that is a lovely result. Why does it work?

Hang on, that's the wrong diagram...

Hmm... I think I've made an algebraic mistake, is that a + or a - sign?

Ahhh, that's more like it.

Ooh some lovely cancelling!!