15y-24)(3y-0.9) = 0
15y - 24 = 0
15y = 24
y =
y = або y = 1.6
3y - 0.9 = 0
3y = 0.9
y = 0.9 : 3
y = 0.3
y1 = 1.6 ; y2 = 0.3
15y-24)(3y-0.9) = 0
15y - 24 = 0
15y = 24
y =
y = або y = 1.6
3y - 0.9 = 0
3y = 0.9
y = 0.9 : 3
y = 0.3
y1 = 1.6 ; y2 = 0.3