Quote Originally Posted by Abigail View Post
Well... at the risk of sounding wrong I'd do:

2n^3 = 5n^2 + 3n

Always add the powers.

2n^3 = 5n^3 + 3

Add the numbers (I think)

2n^3 = 8n^3


Not sure where to go from there. I'd suggest 2/8, which would be 0.25. I think you subtract powers so it would just be 0.25n.

Its a long time since I did GCSE (I did higher but only did one year of it) so its a bit rusty. Does the question ask to solve the formula?

What exam board and course are you doing?
thats wrong cos if you look at your answer youve effectively written 2n³ = 8n³ which isnt right as n³ is going to be the same number on both sides so multiplying it by 2 and 8 wont give you the same answer