Crosswinds
Member
Hiii.
Okay can someone please help me with this question? Keeping in mind you're speaking to someone who is mathematically challenged. I have a worked answer for it but I don't understand it.
Factorise fully:
(m+2n)3 + (m-2n)3
The answer is:
2m(m2+12n2)
The first line of working is:
(m+2n+m-2n)((m+2n)2-(m+2n)(m-2n)+(m-2n)2)
Whhhyy?
Sorry for the semi-public display of stupidity but this is eroding my will to live.![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Okay can someone please help me with this question? Keeping in mind you're speaking to someone who is mathematically challenged. I have a worked answer for it but I don't understand it.
Factorise fully:
(m+2n)3 + (m-2n)3
The answer is:
2m(m2+12n2)
The first line of working is:
(m+2n+m-2n)((m+2n)2-(m+2n)(m-2n)+(m-2n)2)
Sorry for the semi-public display of stupidity but this is eroding my will to live.