Question

упростить:
5√48-2√75

(3√2+√18)*√2

(4-√5) в квадрате

Answer 1

$5 sqrt{48} - 2 sqrt{75} = 20 sqrt{3} - 10 sqrt{3} = 10 sqrt{3}$
$(3 sqrt{2} + sqrt{18} ) times sqrt{2} = (3 sqrt{2} + 3 sqrt{2} ) times sqrt{2} = 6 sqrt{2} times sqrt{2} = 6 times 2 = 12$
$(4 - sqrt{5} ) {}^{2} = 16 - 8 sqrt{5} + 5 = 21 - 8 sqrt{5}$