Question

$(x\sqrt{6} -2)^2 + 2(x+ \sqrt{6})^2 + ( \sqrt{6} - x\sqrt{2} ) ( \sqrt{6} + x \sqrt{2})$

Answer 1

6x² - 4√6·x + 4 +2x² + 4x√6 +6 + 6 - 2x² = 6x² + 16 = 2(3x² + 8)