Question

••••Помогите пожалуйста•••• =}

Answer 1

$1. \ ( frac{7}{12}+ frac{3}{8})*3=( frac{14+9}{24})*3= frac{23}{24}*3= frac{23}{8} =2,875 \ \ 2. \ 1-b^2 textless 0 \ -b^2 textless -1 \ b textgreater 1 \ ---2)--- \ \ 3. \ 30 sqrt{2}-(5+3 sqrt{2})^2= \ =30 sqrt{2}-(25+30 sqrt{2}+18)= \ =30 sqrt{2}-25-30 sqrt{2}-18= \ =-43$