Question

Tolongin dong plisssssss!!!!!!!!!!

Answer 1

13. sisi = 1/ (√3-1)
= 1/(√3-1) . (√3+1)/(√3+1)
= (√3+1)/2
keliling = 4 sisi
= 4 . (√3+1) / 2
= 2(√3+1)
= 2√3 + w

14. p= (9√2-5√3) l = (3√2+√3)
luas = p.l
=( 9√2-5√3)(3√2+√3)
=54+9√6-15√6-15
= 39 - 6√6

15. 27^2/3 + 16^3/4 - 3√8/8^-2/3
= 9 + 8 - (2.4)
= 9

17. √5/√5-√3
= (√5)/(√5-√3) . (√5+√3)/(√5+√3)
= (√5)(√5+√3)/ 2
= 1/2 (5+√15)