If 125x = 2010 find x

Assessment: JAMB UTME - Mathematics - 2008 Subject: General Mathematics

Question 1 Report

If 125x = 2010 find x
Answer Details
125x = 20
1xX2 + 2xX1 + 5xX0 = 20
X2 + 2X + 5 = 20
X2 + 2X - 15 = 0
(X + 5)( X - 3) = 0
X + 5 implies X = -5
X - 3 implies X = 3
But X cannot be negative
∴X = 3

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