Instructions

What should come in place of the question mark (?) in the following question ?

Question 43

$$(?)^{2}+15^{2}-33^{2}=97$$

Solution
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Rearranging we get, 97+33^2-15^2 = 97 + 1089 - 225 = 961

Now x^2= 961

Hence, x=31

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