Posted by JustinBieber on Thursday, January 10, 2013 at 11:25pm.
8x^3-125
This is a difference of cubes which has the pattern
A^3 - B^3 = (A-B)(A^2 + AB + B^2)
so 8x^3-125
= (2x - 5)(4x^2 + 10x + 25)
you have a typo in your second, but it looks like there would be a common factor.
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