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69a Math
Question 17
2010 December(69A) Math Question 17
Quadratic Equations
- FOIL
Choice D
$$=5c(2d-5c)-3d(2d-5c)$$ $$=10cd-36c^{2}-6d^{2}+15cd$$ $$=25cd-36c^{2}-6d^{2}$$
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