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How to foil (u-4)(u+8)?

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please help
asked Nov 26, 2014 in ALGEBRA 1 by anonymous

1 Answer

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The expression is (u - 4)(u + 8)

FOIL method: the product of two binomials is the sum of the products of the First terms, the Outer terms, the Inner terms and the Last terms.

First term - multiply first terms in the parenthesis = u * u = u²

Outer term - multiply the two terms on the outside = u * 8 = 8u

Inner term - multiply the two inside terms = -4 * u = -4u

Last term - multiply the last terms in the parenthesis = -4 * 8 = -32

Foil Method is sum of all = u² + 8u - 4u -32

(u - 4)(u + 8)  = u² + 4u - 32

Therefore (u - 4)(u + 8)  = u² + 4u - 32.

answered Nov 26, 2014 by Lucy Mentor
edited Nov 26, 2014 by Lucy

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