Question

Calcule:
√28-2√63+√27+√108+√3

Answer 1

√28 - 2√63 + √27 + √108 + √3

$\sqrt{28} - 2 \sqrt{63} + \sqrt{27} - \sqrt{108} + \sqrt{3} \\ \\ \\ \sqrt{2^2 . 7} - 2 \sqrt{3^2. 7} + \sqrt{3^3} - \sqrt{2^2.3^3} + \sqrt{3} \\ \\ \ 2\sqrt{7} - 6 \sqrt{7} + 3\sqrt{3} - 6\sqrt{3} + \sqrt{3} \\ \\ -4\sqrt{7} + 3\sqrt{3} - 7\sqrt{3} \\ \\ -4\sqrt{7} + 10\sqrt{3} \\ \\ =\ \textgreater \ 10\sqrt{3} -4\sqrt{7}$