Question

Пж жпжпжпжпжпжпжжпжпжпжп​

Answer 1

Пошаговое объяснение:

Е) 2а–3b+4a–5b+7a–2b–3b=2a+4a+7a–3b–5b–2b–3b=

=13a–13b=13(a–b)

ж) 1/2mn+0,2m×mn²–0,5mn+0,2mn×0,4mn=

=0,5mn+0,2m²n²–0,5mn+0,08m²n²=

=0,5mn–0,5mn+0,2m²n²+0,08m²n²=0,28m²n²

з) х²•ху–у•у²х+0,3х²•ху–0,8х•х²у+ух³+2ху³=

=х³у–ху³+0,3х³у–0,8х³у+х³у+2ху³=

=х³у+0,3х³у–0,8х³у+х³у–ху³+2ху³=2х³у–0,5х³у–ху³=

=1,5х³у–ху³=ху(1,5х²–у²)

и) 3abd–4bc•1d/2+3a•1bd/3–2ab•2d–2abd+15ab•1c/3

=3abd–2bcd+abd–4abd–2abd+5abc=

=3abd+abd–4abd–2abd–2bcd+5abc=

= –2abd–2bcd+5abc