Posted by mateyo on Wednesday, March 14, 2012 at 11:00am.
maths - Reiny, Wednesday, March 14, 2012 at 11:04am
check your typing, I suspect a typo.
maths - Steve, Wednesday, March 14, 2012 at 2:38pm
since ^ is shift-6, I suspect you meant:
cubics are not generally easy to solve, so look for easy integral roots first: ±1, ±2
A little synthetic division yields
Using the quadratic formula, you get
x = 3±2√2
so, the factorisation is
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