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Question

If x =23+7, then (x−3)2 =

(a) 1
(b) 3
(c) 6
(d) 7

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Solution

Given that:

We know that rationalization factor for is. We will multiply numerator and denominator of the given expression by, to get

Therefore,

On squaring both sides, we get

Hence the value of the given expression is.


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