If 125x = 2010 find x
-
A.
2 -
B.
3 -
C.
4 -
D.
5
Correct Answer: Option B
Explanation
125x = 20
1xX2 + 2xX1 + 5xX0 = 20X2 + 2X + 5 = 20X2 + 2X – 15 = 0
(X + 5)( X – 3) = 0X + 5 implies X = -5X – 3 implies X = 3
But X cannot be negative
∴X = 3
125x = 20
1xX2 + 2xX1 + 5xX0 = 20X2 + 2X + 5 = 20X2 + 2X – 15 = 0
(X + 5)( X – 3) = 0X + 5 implies X = -5X – 3 implies X = 3
But X cannot be negative
∴X = 3