Its binomial expansions, like nCr and (p+q). Its C2 maths. Cant really teach you tbh, the final answer range is quite large though. Im gunna have to go now however, sorry.
Thank you so much for your hint - I GOT IT! I can finally sleep now; thanks again aahh!
I feel so stupid now after I have worked out the answer to chemistry as I used that chemical in one of my experiments but I was told not to care about it so I forgot about it
Its binomial expansions, like nCr and (p+q). Its C2 maths. Cant really teach you tbh, the final answer range is quite large though. Im gunna have to go now however, sorry.