help me to solve the sums of rational number
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Step-by-step explanation:
a = 2+√3
1/a = 1/ (2+√3)
= 1 ( 2-√3) / (2+√3) (2-√3)
= 2-√3 / 2² - (√3)²
= 2-√3 / 4-3
=2-√3
a - 1/a = 2+√3 -2 +√3
= 2√3
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