Question

Помогите решить 2 задание

Answer 1

$a) sqrt{27}- sqrt{75}+sqrt{48}=3sqrt{3}-5sqrt{3}+4sqrt{3}=2sqrt{3} \ b)(12sqrt{45}+15sqrt{20}):3sqrt{5}= frac{3(4sqrt{45}+5sqrt{20})sqrt{5}}{3}= \ =(4sqrt{45}+5sqrt{20})sqrt{5}=((4*3+5*2)sqrt{5} )sqrt{5}=(4*3+5*2)5=110  [tex]c) sqrt{( sqrt{x23}-7)^2 } -sqrt{(sqrt{23}-6)^2}=(-sqrt{23}-7)-(-sqrt{23}+6)= \ =-sqrt{23}+7+sqrt{23}-6=1$