Question

4√32 - 5√162 - 3√50 +5√72 - 2√578

Answer 1

4x4$\sqrt{2}$-5x9$\sqrt{2}$-3x5$\sqrt{2}$+5x2x3$\sqrt{2}$-2x17$\sqrt{2}$=16$\sqrt{2}$-45$\sqrt{2}$-15$\sqrt{2}$+30$\sqrt{2}$-34$\sqrt{2}$=-48$\sqrt{2}$