0
Anonymous
3u - 5u
= - 2u
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2u + 1 = 5u + 5 2u - 5u = 5 - 1 -3u = 4 3u = -4 u = -4/3
(9 - 5u)(9 + 5u)
If: -52 --3u = 8 then u = 20
No. It is a sum of four terms which can be simplified to a sum of three terms.
3u2-1