Question

rezolva ex.5!!! Calculati produsul a si b​

Answer 1

a = radical 48 - radical 18 - radical 108 + radical 128 = 4 radical 3 - 3 radical 2 - 6 radical 3 + 8 radical 2 = 5 radical 2 - 2 radical 3

b = radical 162 - radical 75 - radical 32 + radical 147 = 9 radical 2 - 5 radical 3 - 4 radical 2 + 7 radical 3 = 5 radical 2 + 2 radical 3

a × b = (5 radical 2 - 2 radical 3)(5 radical 2 + 2 radical 3) = (5 radical 2)^2 - (2 radical 3)^2 = 25×2 - 4×3 = 50 - 12 = 38

R: a × b = 38