Question

Berapakah Nilai r jika : (6-6r)r =3/2

Answer 1

6r - 6r^2 = 3/2
2(6r-6r^2) = 3
12r - 12r^2 = 3
12r^2 - 12r + 3 = 0
(4r - 3)(3r - 1) = 0
r = 3/4    atau    r =1/3

Answer 2

(6-6r)r=3/2
6r-6r^2=3/2
-6r^2+6r=3/2
-6r^2+6r-3/2=0
6r^2-6r+3/2=0
(6r-3)(2r-3)=0
6r-3=0 atau 2r-3=0
r=1/2 atau r=3/2