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
$= 7 c (2 c + d) - 2 d (2 c + d)$ $= 14 c^{2} + 7 c d - 4 d c - 2 d^{2}$ $= 14 c^{2} + 3 c d - 2 d^{2}$
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