Question

Решите уравнения (у- 8)(5+у)=0
(2х-1,2) (6+2х)=0

Answer 1

(y-8)(5+y)=0

5y+y"2-40-8y=0

-3y+y"2-40=0

-y2+3y+40=0

D=9+160=169

Y1=-3-13/-2=8

Y2=-3+13/-2=-5