Question

Punctul a de la exercitiul 21.. Mi-l puteti rezolva si sa imi explica-ti cum l-ati rezolvat?

Answer 1

√5 ×(√125+√20-√180)+3√5×√80=
=(√(125×5)+√(20×5)-√(180×5)+3√(80×5)=
=√625+√100-√900+3√400=
=25+10-30+3×20=
=35-30+60=
=5+60=
=65