Question

if a^2+b^2=8and (a-b)^2=4,what is the value of ab

Answer 1

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Answer 2

(a-b)^2=a^2-2ab+b^2=a^2+b^2-2ab=8-2ab=4
8-2ab=4
-2ab=-4
ab=2

Answer 3

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Answer 4

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Answer 5

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Answer 6

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Answer 7

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Answer 8

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