(7/2-8/5)2+4/5*(7/10-9/16)=.....Срочно помогите

Question

(7/2-8/5)2+4/5*(7/10-9/16)=.....Срочно помогите

Answer 1

=(35/60-32/60)*2+4/5*(56/80-45/80)=
=3/60*2/1+4/5*11/80=1/10+11/100=
=10/100+11/100=21/100=0,21