if a equal to 2 + root 3 find the value of root a + 1 upon root a
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a=2+√3
∴, 1/a=1/(2+√3)=(2-√3)/(2+√3)(2-√3)=(2-√3)/(4-3)=2-√3
∴, a+1/a=2+√3+2-√3=4
now, a²=(2+√3)²=4+4√3+3=7+4√3
1/a²=(1/a)²=(2-√3)²=4-4√3+3=7-4√3
∴, a²+1/a²=7+4√3+7-4√3=14
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Answer:
4 is the answer for the given, problem
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