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25-06-2015
Mathematics

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Expand and simplify: (3a + 2)(4a –5) A. 12a2 + 23a + 10 B. 12a2 – 10 C. 12a2 – 7a – 10 D. 12a2 + 7a – 10

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26-06-2015

c.
use foil
12a^2 - 15a + 8a - 10
12a2 - 7a - 10

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