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A-
A
A+
Let
and
compute A
2
– B
2
.
Given, A
B
......(1)
......(2)
Subtracting equation 2 from 1,
Hence,
15
and 
compute A2 – B2.
B
......(1)
......(2)
and compute A2 – B2. B ......(1) ......(2)