I have a maths problem which shouldn't be too hard, but I dont quite understand it: Write down the expansion of sqrt(1+h) up to and including the term in h^3 By Considering 3 x 16 find values for constants a and h such that 3= a^2 (1+h). Hence estimate the value of sqrt3. Sorry, I dont know how to do mathematical symbols on the computer. I have done the expansion, but dont know how to do the second part. What does it mean 'by considering 3 x 16' Thanks in advance for any help. Plutoegg