Răspuns:
Explicație pas cu pas:
a = 5√2 + 3√18 - 2√50 =
5√2 + 3√(9×2) - 2√(25×2) =
5√2 + 3×3√2 - 5×2√2 =
5√2 + 9√2 - 10√2 =
4√2
b = 6√2/3 + √98/5 =
6√2/3 + √(49×2)/5 =
6√2/3 + 7√2/5 =
30√2/15 + 21√2/15 =
41√2/15
m.g. = √(a×b) = √(4√2 ×41√2/15) = √(41×4×2/15) = √(324/15) = 18/√15 =
18√15/15 = 6√15/5