a) √25-√49 = 5 - 7 = -2
б) √16*√9 = 4 * 3 = 12
в) 3√4-√36 = 3 * 2 - 6 = 6 - 6 = 0
г) √64:√900 = 8 / 30 = 4/15
a) √0,36+√0,01 = 0.6 + 0.1 = 0.7
в) -3√0,49+2,6 = -3 * 0.7 + 2.6 = -2.1 + 2.6 = 0.5
г) 0,4 * √0,04 = 0.4 * 0.2 = 0.08
б) 1/8 √0,64-1 = 1/8 * 0.8 - 1 = 0.1 - 1 = -0.9