plz give answers fast
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(√7-1)/√7+1 - √7+1/√7-1 = a + b√7
=>(√7-1)² -(√7+1)²/ (√7)² - 1²
= a +b√7
=>7-2√7 +1 - 7 -2√7 -1 / 7-1 = a+b√7
=>4√7/6 = a + b√7
plz simplify and find the answer
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