ACT 2011 June(69F) Math Question 10 Explanation - ACT Helper

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2011 June(69F) Math Question 10
Quadratic Equations
- FOIL
Choice J
$$=7c(2c+d)-2d(2c+d)$$ $$=14c^{2}+7cd-4dc-2d^{2}$$ $$=14c^{2}+3cd-2d^{2}$$
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