Question

Помогите!!Пожалуйста))

Answer 1

Решение на фото) лови

Answer 2

=м^85
$$$$$$$$$
=с^15
$$$$$$$$$
=а^2+а-а^2+6а-9=7а-9=7×(-1)-9=-16
$$$$$$$$$$$
=а^2-6а+9-5а^2+6а=-4а^2+9=-4×(-1/2)^2+9=
=-4×1/4+9=-1+9=8
$$$$$$$$$$$$$
=(х^2у-х^2)-(у-1)=х^2(у-1)-1(у-1)=(у-1)(х^2-1)