Question

exercițiile 2 Si 3
urgennnt ​

Answer 1

a+1/a=5
a+1/a totul la a doua=5 la a doua =25
a”+a x 1/a x 2+1/a”=25|-2
a” + 1/a”=23|+1
a”+1/a”+1=24

Answer 2

2) (√3-5)^2+2|√3-5|+12√3= 3-10√3+25+2×(5-√3)+12√3= 28+2√3+10-2√3= 38 este nr natural

3) a+1/a=5 ridici totul la puterea a 2

(a+1/a) ^2=5^2

a^2+2a/a+1/a^2=25

a^2+1/a^2=25-2

a^2+1/a^2=23

iar a^2+1/a^2+1=23+1=24