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nobillionaireNobley
2x^3 + 5x^2 - 8x - 20 = x^2(2x + 5) - 4(2x + 5) = (x^2 - 4)(2x + 5) = (x - 2)(x + 2)(2x + 5)

Answer:Check for a greatest common factor.

There are four terms, so consider factoring by grouping, which yields  

(2x +5)(x2 – 4).

Identify x2 – 4 as the difference of squares.

Factor completely as  

(2x + 5)(x + 2)(x – 2).

Step-by-step explanation:

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