Posted by Ashley J on Tuesday, June 1, 2010 at 10:06pm.
The first one is the difference of cubes
a^3 - b^3 = (a-b)(a^2 + ab + b^2)
so
8y^3 - 27
= (2y-3)(4y^2 + 6y + 9)
the second doesn't factor over the real numbers.
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