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 целая 9/16=
√2·42·77/5·11·15-3.2√25/16
= 
√2·6·7·7·11·/5·11·5·3-3.2·5/4=√2·2·3·7·7/5·5-
3.2·5/4=2·7/5-0.8·5=14/5-4=2.8-4=-1.2