Find the positive number n, such that thrice its square is equal to twelve times the number
A
1
B
2
C
3
D
4
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
3n2 = 12n
= 3n2 - 12n = 0
= 3n(n - 4) = 0
∴ n = 4
Source: Myschool Past Questions Archive (Record #31409)