Question

Упрости выражение.
1) √28+ 2√20-7√4/7 - 1/2√180
2) 3√12 - √48- 10√3/4 + 9√1/3

Answer 1

1) √28+ 2√20-7√4/7 - 1/2√180=2√7+2*2√5-2√7-1/2*6√5=
=2√7+4√5-2√7-3√5=√5
2) 3√12 - √48- 10√3/4 + 9√1/3 =3*2√3-4√3-10√3/2+3√3=
=6√3-4√3-5√3+3√3=0