A) 75
B) 80
C) 85
D) 90
Correct Answer: B
Solution :
\[{{(x+y)}^{2}}={{x}^{2}}+{{y}^{2}}+2xy\] \[\Rightarrow \] \[{{12}^{2}}={{x}^{2}}+{{y}^{2}}+64\] \[\Rightarrow \] \[{{x}^{2}}+{{y}^{2}}=144-64=80\]You need to login to perform this action.
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