- Given that x + y = 43 and 4xy = 48, find the value of
(i) (2x-2y)^2
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Answer:
2^2 × (x-y)^2
4 × [ (x+y)^2 - 4xy]
4 × (43×43 -48 )
4 × ( 1849 - 48 )
4 × ( 1801 )
7204
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