please solve needed it very very urgently.... ur help can improve my marks in test...plz help i will mark as brainlist ...thank u
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x=7+5√2
_______
1/x=1/7+5√2
=>1×(7-5√2)/7+5√2×(7-5√2)
=>7-5√2/49-50
=>7-5√2/-1
=>-(7-5√2)
≈≈≈≈≈≈≈×≈≈≈≈
(x+1/x)²=x²+1/x²+2
(7+5√2+(-7+5√2)²=x²+1/x²+2
(2×5√2)²-2=x²+1/x²
(10√2)²-2=x²+1/x²
200-2=x²+1/x²
198=x²+1/x²
_______
1/x=1/7+5√2
=>1×(7-5√2)/7+5√2×(7-5√2)
=>7-5√2/49-50
=>7-5√2/-1
=>-(7-5√2)
≈≈≈≈≈≈≈×≈≈≈≈
(x+1/x)²=x²+1/x²+2
(7+5√2+(-7+5√2)²=x²+1/x²+2
(2×5√2)²-2=x²+1/x²
(10√2)²-2=x²+1/x²
200-2=x²+1/x²
198=x²+1/x²
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