√2/5 * √42/11 * √77/15 - 3.2*√ 1 целая 9/16 Где / - дробь

Question

√2/5 * √42/11 * √77/15 - 3.2*√ 1 целая 9/16

Где / - дробь

Answer 1

√2/5 * √42/11 * √77/15 - 3,2*√ 1 9/16 = √2/5 * 42/11 * 77/15 - 32/10*√25/16 = √196/25 - 32/10*5/4 = 14/5 - 8/2 = 2,8 - 4 = - 1,2  (или  = 28/10 - 40/10 = -12/10 = - 1 1/5)