1.

If (a+b):(a-b)=15:1 then the value of a^(2)-b^(2) is:

Answer»

56
15
112
8

Solution :`((a + B))/((a - b)) = 15/1 implies a/b = 8/7` (by componendo and dividendo)
THEREFORE `a^2 - b^2 = 64 -49 = 15


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