the sum of two digits is 29. And difference of their squares is 145. What is the difference of the digits?
wardahd1234:
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hey
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here is ur answer
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hlww.. ^_^
let the digits be a and b..
(given that )
a + b = 29.
a^2 - b^2 = 145.
==> (a - b ). (a + b) = 145
==> (a-b ) = 145/a + b
==> 145/29 = 5
SO,
the difference of the digits is 5.
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