(C) To find the square root of $(272^{2}-128^{2})$,we use the algebraic identity $a^{2}-b^{2}=(a+b)(a-b)$.Here,$a=272$ and $b=128$.Substituting these

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(C) To find the square root of $(272^{2}-128^{2})$,we use the algebraic identity $a^{2}-b^{2}=(a+b)(a-b)$.Here,$a=272$ and $b=128$.Substituting these values,we get:$\sqrt{272^{2}-128^{2}} = \sqrt{(272+128)(272-128)}$$= \sqrt{(400)(144)}$$= \sqrt{400} \times \sqrt{144}$$= 20 \times 12$$= 240$