√7-1 √7+1
2=a+bV7
√7+1 7-1
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(√7–1)/(√7+1) - (√7+1)/(√7–1) = a + b√7
=>(√7–1)(√7–1)/(√7+1)(√7–1) -
(√7+1)(√7+1)/(√7–1)(√7+1) = a+b√7
=>(7–2√7+1)/(7–1) - (7+2√7+1)/(7–1) = a+b√7
=> 2(4-√7)/6 - 2(4+√7)/6 = a+b√7
=> (4 -√7 -4 -√7)/3 = a + b√7
=> (-2/3)√7 = a+b√7 => a = 0, b = -2/3.
I hope you are understand My solution
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