1.Factor using difference of cubes (a-b)(a2+ab+b2)
8x3-27
2.Factor by grouping 2x3+7x2+2x+7
3.List the possible roots using the Rational Root Theorem x= +- p/q where q is the leading coefficient and p is the constant
f(x) = 3x5 - 2x2 - 7x + 4
divides entirely
n can be 1, 3, -1 ,-3
(possible denominators of the result)
divides entirely
m can be 1, 4, -1, -4, 2, -2
(possible numerators of the result)
m/n (or p/q) can be the one of combinations of this numbers:
1, -1, 1/3, -1/3, 4, -4, 4/3, -4/3, 2, -2, 2/3, -2/3
Using the substitution method with each of these possiblle roots,
we can find out that m/n=x=2/3.
It is the root of this polynom at which it vanishes, takes a zero value.
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