a) √5•(√125+√20–√180)+3√5•√80
=√5•(5√5+2√5–6√5)+3√5•5√5
=√5•(5√5+(-4√5))+15•5
=√5•(5√5–4√5)+75
=√5•√5+75
=√25+75
=5+75
=80
b) √32•(√108+√147–√243)+√27•(√98–√72+√242)
=4√2(6√3+7√3–9√3)+3√3(7√2–6√2+11√2)
=4√2•(6√3+(-2√3))+3√3(√2+11√2)
=4√2•(6√3–2√3)+3√3•12√2
=4√2•4√3+36√6
=16√6+36√6
=52√6
c) √28•(√20–√80+√500–√45)–√20•(√567-√63+√448-√112)
=2√7•(2√5-4√5+10√5-3√5)-2√5•(9√7-3√7+8√7–4√7)
=2√7•(-2√5+7√5)-2√5•(6√7+4√7)
=2√7•5√5–2√5•10√7
=10√35–20√35
=-2√35
d) √60•(√150+√384-√216)–√250
=2√15•(5√6+8√6-6√6)-5√10
=2√15•(5√6+2√6)-5√10
=2√15•7√6-5√10
=14√90-5√10
=42√10-5√10
=37√10
Dacă mai este nevoi îți trimit sunt prea multe ! :)
