if X equals to 1 by root 5 minus 2 then the value of x square + 1 by x square is what
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Answer: x²+1/x²=18
Step-by-step explanation:
x=1/√5-2
=√5+2/(√5)²-(2)²
=√5+2/5-4 = √5+2
x=1/√5-2
1/x=√5-2
x²+1/x² = (√5+2)²+(√5-2)²
=(5+4√5+4)+(5-4√5+4)
= 9+4√5+9-4√5 =18
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