On 14.12.12 21:53, cypher wrote: > How do I combine equations symbolically? For example: > > f1 = sym('ax +b') > f2 = sym('cx+d') > f3 = f1*f2 > I'm looking for an output like > f3 = 'acx^2+bcx+adx+bc'
If you mean the product a*x, don't write ax ? variables can have longer names and ax is ist just that, a single variable. Also, I'd recommend not to use strings:
syms a b c d x f1 = a*x+b; f2 = c*x+d; collect(f1*f2, x)