Write down the set A = $[x : x^{2} = 25]$ ____.

(5, - 5)

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(5, 25)

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(5)

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(2)

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Solution

The correct option is A $(5, - 5)$
solution:
for $[x : x^{2} = 25]$
we know that if $x^{2} = 25 x = + 5 o r - 5$
so writing in the form of set we get values of x as
$(5, - 5)$
hence the correct option: A

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