A) 40
B) 52
C) 38
D) 42
Correct Answer: B
Solution :
(b): \[{{(a+b)}^{2}}{{(a-b)}^{2}}={{2}^{2}}+{{10}^{2}}\] \[\Rightarrow 2\left\{ {{a}^{2}}+{{b}^{2}} \right\}=104.\] \[\Rightarrow {{a}^{2}}+{{b}^{2}}=52.\]You need to login to perform this action.
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