# Using Binomial Expansion for Large Sums

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#1
Hi
This comes out of the AQA A-Level textbook.
My tutor said they couldn't do it which was a bit disappointing as I am determined to see how it is possible.

"Show how the binomial expansion can be used to work out without a calculator."

I can see links between some figures, but I can't find a way to tie them all together and solve.

(65.1*29.2+65.1*35.9-91.7-26.4+65.3*26.4)/(18.3^2-18.3*5.4)
0
1 month ago
#2
(Original post by JackBushnell1990)
Hi
This comes out of the AQA A-Level textbook.
My tutor said they couldn't do it which was a bit disappointing as I am determined to see how it is possible.

"Show how the binomial expansion can be used to work out without a calculator."

I can see links between some figures, but I can't find a way to tie them all together and solve.

(65.1*29.2+65.1*35.9-91.7-26.4+65.3*26.4)/(18.3^2-18.3*5.4)
Can you post a photo or screenshot of the question?
0
1 month ago
#3
(Original post by JackBushnell1990)
Hi
This comes out of the AQA A-Level textbook.
My tutor said they couldn't do it which was a bit disappointing as I am determined to see how it is possible.

"Show how the binomial expansion can be used to work out without a calculator."

I can see links between some figures, but I can't find a way to tie them all together and solve.

(65.1*29.2+65.1*35.9-91.7-26.4+65.3*26.4)/(18.3^2-18.3*5.4)
The question doesn't mention the binomial expansion. http://prntscr.com/16cls0d

Without that misleading instruction, it's quite straightforward.
0
1 month ago
#4
(Original post by Plücker)
The question doesn't mention the binomial expansion. http://prntscr.com/16cls0d

Without that misleading instruction, it's quite straightforward.
The typo in the expression in the OP matches
https://www.thestudentroom.co.uk/sho....php?t=5626982
The corrected version isn't too bad as you say.
0
1 month ago
#5
(Original post by Plücker)
The question doesn't mention the binomial expansion. http://prntscr.com/16cls0d

Without that misleading instruction, it's quite straightforward.
Some good detective work there - PRSOM. Was unable to locate it myself.
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