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Factoring polynomials and primes

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Factor the polynomial below, if prime say so.

Section 6.5

Reference: Examples 3 and 4
Factor each polynomial completely. If a polynomial is prime say so.

Note: See page 303 "Factoring a Difference or Sum of Two Cubes" to factor (m3+n3). This is a good example of factoring by long division and leads to the formula below.

a + b = (a + b)(a^2 -ab + b^2).

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The solution shows how to factor polynomials.

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