Formulas:
a3+b3=(a+b)(a2−ab+b2),
a3−b3=(a−b)(a2+ab+b2).
The first factor repeats the sign of the original expression
In the second factor, the sign before ab is the opposite
Do not confuse the sum-of-cubes and difference-of-cubes formulas
Factor the expression.
Sum of cubes
x3+8
=(x+2)(x2−2x+4)
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