How do I show that

equals

and then how that equals

Thanks!

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- Sep 4th 2008, 05:20 PMRubyRedDifference of Squares
How do I show that

equals

and then how that equals

Thanks! - Sep 4th 2008, 06:40 PMSoroban
Hello, RubyRed!

Quote:

How do I show that: .

and then how that equals: .

The numerator is: .

. . . . . . . a difference of squares

which factors: .

The fraction becomes: .

. . which reduces to: .

Expand the cube: .

. . .