a + b = 15
a^2 + b^2 = 172
a + b = 15
=> a = 15 - b
=> a^2 = (15-b)^2
So,
a^2 + b^2 = 172
=> (15-b)^2 + b^2 = 172
Solve for b, find the difference.
he sum of two numbers is 15 the sum of the squares of the same two numbers is 172 fined the difference between the two numbers
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