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If a=1 and b=−5, evaluate (a−b)squared−(a b)squared

Mathematics
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If

Jul 4th, 2014

We plug values of a = 1 and b = -5   and get the answer

(a - b)^2 -  (a +b)^2

= (1 - (-5))^2 -  (1 - 5)^2

= (1 + 5)^2 - (-4)^2

= 6^2 - (-4)^2

= 36 - 16

= 20

Jul 5th, 2014

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Jul 4th, 2014
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