Question

(5y-2)*(y+3)-2*(y-7)*(y+7)=3*(1+y)^2-3

Answer 1

Ответ:

$y=9,5$

Объяснение:

$(5y-2)*(y+3)-2(y-7)(y+7)=3*(1+y){}^{2}-3$

$5y{}^{2}+13y-6-2y{}^{2}+98=3+6y+3y{}^{2}-3$

$10y+95=0$

$y=9,5$