A drawing in Algebra
Most people do not think of algebra as doing a drawing but at the time of Al-Khwarizmi (c800AD) people thought problems could only be solved if they could be drawn.
(x + y)2 = x2 + 2xy + y2 Draw this!
Conclusion: The drawing shows clearly that (x+y)2 = x2 + 2xy + y2
Test yourself: Try to do a drawing which will show the connection between (x-y)2 and x2-2xy+y2(This could be difficult! But let us know how you get on. Use the contact e-mail below.)