A) \[-2\]
B) \[2\]
C) \[-1\]
D) \[1\]
Correct Answer: B
Solution :
| [b] \[\sqrt{{{(-1-2)}^{2}}+{{(x+2)}^{2}}}=5\] |
| \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,9+{{x}^{2}}+4+4x=25\] |
| \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,{{x}^{2}}+4x-12=0\] |
| \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,{{x}^{2}}+6x-2x-12=0\] |
| \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,(x+6)\,\,(x-2)=0\] |
| \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,x=-6,2\] |
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