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Question
Expand : `(2"a"-1/(2"a"))^3`
Sum
Solution
`(2"a"-1/(2"a"))^3=(2"a")^3-(1/(2"a"))^3-3xx2"a"xx1/(2"a")(2"a"-1/(2"a"))`
`=8"a"^3-1/(8"a"^3)-3(2"a"-1/(2"a"))`
`=8"a"^3-1/(8"a"^3)-6"a"+3/(2"a")`
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Cubes of Binomials
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