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2X^3-X^2-10X+5

0 votes

what is the answer using the grouping method?

factoring-polynomials
polynomial-function

asked Mar 11, 2014 in ALGEBRA 2 by andrew Scholar

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1 Answer

0 votes

The polinomial is 2x ^3 - x ^2 - 10x + 5.

Factor by grouping.

x ^2(2x - 1) - 5(2x - 1).

(2x - 1)(x ^2 - 5)

(2x - 1)(x ^2 -(√5)^2)

Factor : (2x - 1)(x + √5)(x - √5).

Therefore, 2x ^3 - x ^2 - 10x + 5 = (2x - 1)(x + √5)(x - √5).

answered Apr 1, 2014 by lilly Expert

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