Question

Упростить уравнение

2)3(a-1)^2+80

3)1-(2a-1)^2

4)z^2+1-(1+z^2)

Answer 1

Ответ:

$3(a-1)^2+80=3(a^2-2a+1)+80=3a^2-6a+83\\\\\\1-(2a-1)^2=1-(4a^2-4a+1)=-4a^2+4a\\\\\\z^2+1-(1+z^2)=z^2+1-1-z^2=0$