Решите уравнение. (1,8-0,3y)(2y+9)=0 ; (5y+4)(1,1y-3,3)=0

1.8-0.3y=0

0.3y=1.8

y=1.8/0.3

y(1)=6

2y+9=0

2y=-9

y=-9/2

y(2)=-4.5

5y+4=0

5y=-4

y=-4/5

y(1)=-0.8

1.1y-3.3=0

1.1y=3.3

y=3.3/1.1

y(2)=3