2006
Mathematics
JAMB
If m:n = 13:111, find m2 - n2 : (m + n)2
A.
1:11
B.
1:13
C.
1:10
D.
1:12
Correct Answer: 1:12
Explanation
m : n = 13 : 11 m2 - n2 = (m - n)2 = 132 - 112 : (13 + 11)2 = 169 - 121 : 242 = 48 : 576 = 1 : 12
m : n = 13 : 11 m2 - n2 = (m - n)2 = 132 - 112 : (13 + 11)2 = 169 - 121 : 242 = 48 : 576 = 1 : 12THIS WEEK's
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