Question

(2radical3+1)×(radical3-2)

Answer 1

$(2 \sqrt{3} + 1) \times ( \sqrt{3} - 2) = \\ \\ 6 - 4 \sqrt{3} + \sqrt{3} - 2 = \\ \\ (6 - 2) + ( - 4 \sqrt{3} + \sqrt{3}) = \\ \\ 4 - 3 \sqrt{3}$