faktor 18y^2+90y+180=0 dengan caranya

a = 18
b = 90
c = 180.
18y^2 + 90y + 180 =(x + m)(x + n)
m + n = b, 30 + 6 = 90
m x n = c, 30 x 6 = 180
18^2 + 90y + 180 = (x + 30)(x + 6)