A) \[(a+b)\,\,\left[ 7(a+b)-14 \right]\]
B) \[7\,\left[ {{(a+b)}^{2}}-2\,(a+b) \right]\,\]
C) \[7\,(a+b)\,\,(a+b-2)\]
D) \[7\,(a+b)\,\,(a+b-2a)\]
E) None of these
Correct Answer: C
Solution :
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