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2014-10-12T22:49:53+03:00
A) 2 \sqrt{3} (6 \sqrt{3} -8 \sqrt{3})- 3 \sqrt{2} (12 \sqrt{2}-6 \sqrt{2})
=
2rad3 * (-2rad3) - 3rad2 * 6rad2 = -4rad3 -18 rad2