9. Find x2, if x = VV5+2+V15-2 V75 +1

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( frac{a+b}{(sqrt{a+b})^{2}+sqrt{a-b}>}, frac{5 u p p o s}{a cdot sqrt{5}}, b=2 ) ( a+b+a-b+2left(a^{2} b^{2}right) ) ( 2 sqrt{5}+2 sqrt{5-4} / sqrt{5}+1 ) ( frac{2 sqrt{5}+2}{5+1}=2 )

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