Question

помогите решить
(√15-√20)*√5=?
(5√2+2√5)*3-√60=?
(√99-√18-√11)*√11+3√22=?

Answer 1

1) (√15-√20)*√5=√75-√100=5√3-10 3) √99*√11-√18*√11-√11*√11+3√22=3√11*√11-3√2√11-√11*√11+3√22=3*11-3√22-11+3√22=22