Question

-3 radical 20*(radical din 5+radical 3)-6(radical din 15-5)

Answer 1

-3 radical 20 * (radical 5 + radical 3) - 6 (radical 15 - 5) = -3 radical(2^2*5) * (radical 5 - radical 3) - 6(radical 15 - 5) = -3*2 radical5 *(radical 5 - radical 3) - 6 radical 15 + 30 = -6 *5 + 6 radical 15 - 6 radical 15 + 30 = 0