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15-01-2019
Mathematics

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Expand (a – 1)(a – 2) by using the FOIL method.

Expand a 1a 2 by using the FOIL method class=

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15-01-2019

The answer is A.

(a-1)(a-2)

a * a= a^2
a * -2= -2a
a * -1 = -1a = a
-1 * -2 = 2 because two negative signs make a positive.

Put them together:

a^2 - 2a - a + 2
= a^2 - 3a +2

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