1.

Which of the following identities is applicable to find the value of \[{{(99)}^{2}}.\]

A.  \[{{a}^{2}}-{{b}^{2}}=(a+b)(a-b)\]
B. \[{{(a-b)}^{2}}={{a}^{2}}-2ab+{{b}^{2}}\]
C.  \[{{(a+b)}^{3}}={{a}^{3}}+3{{a}^{2}}b+3a{{b}^{2}}+{{b}^{3}}\]
D. \[{{(a-b)}^{3}}={{a}^{3}}-3{{a}^{2}}b+3a{{b}^{2}}-{{b}^{3}}\]
Answer» C.  \[{{(a+b)}^{3}}={{a}^{3}}+3{{a}^{2}}b+3a{{b}^{2}}+{{b}^{3}}\]


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