x= √7+√5/√7+√5
y= √7-√5/√7+√5
find x²-y²
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Answer:
x= √7+√5/√7+√5=1
y = (√7-√5)²/7-5
= 7+5-2√35/2
= 6-√35
y²= (6-√35)²
= 36+35-12√35
= 71-12√35
x²-y²
1-(71-12√35)
= 1-71+12√35
= -70+12√35
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