Question

Ajutor plss!Dau coroană plsss ajutați-mă!!!​

Answer 1

Răspuns:

d) 41√6

e) 3(15√7+41√3-105)

f) 2(8√3-7√2)

Explicație pas cu pas:

d) √27(√32-√72+√162-√288)-√8(2√108-5√192)

=3√3(4√2-6√2+9√2-12√2)-2√2(12√3-40√3)

=3√3(-5√2)-2√2(-28√3)= -15√6+56√6= 41√6

e) 15√7+3{-4√3+5[2√7+3(3√3-7)]}= 15√7+3{-4√3+5[2√7+9√3-21]}= 15√7+3{-4√3+10√7+45√3-105}= 15√7+3{10√7+41√3-105} = 15√7+3{10√7+41√3-105} = 15√7+30√7+123√3-315= 45√7+123√3-315=

3(15√7+41√3-105)

f) 2√3-7{8√2-4[5√3+3(4√2-3√3)]:8} = 2√3-7{8√2-4[5√3+12√2-9√3)]:8}=

2√3-7{8√2-4[12√2-4√3)]:8}= 2√3-7{8√2+(-48√2+16√3):8}= 2√3-7{8√2+(-6√2+2√3)}= 2√3-14√2+14√3= 16√3-14√2= 2(8√3-7√2)