Question

Dau coroana!!! Urgent!!!! Mulțam!:))​

Answer 1

a)a=(√5+√3)²-(3√5/√3+5√3/√5)-(1-√2)²-(√2)²

a=5+2√15+3-(3·5+5·3/√15)-(1-2√2+2)-2

a=5+2√15+3-(30/√15)-1+2√2-2-2

a=5+2√15+3-(2·√15·√15/√15)-1+2√2-2-2

a=5+2√15+3-2√15-1+2√2-2-2

a=5+3-1+2√2-2-2=2√2+3

b=2√2-3

b)x=1/2√2+3+1/2√2-3-1/(2√2+3)(2√2-3)

x=2√2-3+2√2+3-1/8-9

x=4√2/-1=-4√2

-5<-4√2<-23/5

-5<-4√2<-4,6