Question

a) 3+√5 \ 2√5 + 7-3√5 \√5 - 25-7√5 \ √45
b) (5\√18 + 1\√2 - √98 \3) : (-3 \ √2) la puterea -1
c) [√8+ √18 \ 5√5 * (√2\3)la puterea -1 ,+2√5\5] :4\√5
ajutati-ma si pe mine :((va roog

Answer 1

a) 3+√5.√5/2.5+7-3√5.√5/5-25-7.√5.√45/45=3+1/2+7-3-25-1/3=-18+1/2-1/3=(-108+3-2)/6=-107/2

b) (5.√2/3.2+√2/2-7√2/3).(-3/√2)=(5√2+3√2-14√2)/6 x(-3√2/2)=
-6√2/6x(-3√2/2)=3

c)(2√2+2√2.√5/25.3√2/2+2√5/5).√5/4=
(2√2+9√5/25+2√5/5).√5/4=
(50√2+9√5+10√5)/25.√5/4=
(50√2+19√5)/25.√5/4=(50√10+95)/100=(10√10+19)/20