SOLUTION: how do i substitute r which is 4/à in à(à+ar+ar^2)

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Question 1057699: how do i substitute r which is 4/à in à(à+ar+ar^2)
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
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Some "a"s are "à", the others are "a".

Are they different?

Unclear.

Please edit and re-post.