The G.C.D. of $5 x y$ and $28 a b$ is

140 x y a b

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Cannot be determined

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1

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Solution

The correct option is B $1$
$5 x y = 1 * 5 * x * y$
$28 a b = 1 * 7 * 2 * 2 * a * b$
G.C.D = $1$

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The G.C.D of 5xy and 28ab is

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6 x^{2} - 5 x y - 6 y^{2} = 0

6 x^{2} - 5 x y - 6 y^{2} + x + 5 y - 1 = 0

G . C . D (a, b) = 1

G . C . D (a + b, a - b)

x^{3} + x^{2} - x - 1

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