If x=√3+1, then how do I find the value of (x+2/x)²?
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Answer:
Step-by-step explanation:
(x + 2/x)² = x² + 2. x. 2/x + (2/x)²
= x² + 4 + 4/x²
= (√3+1)² + 4 + 4/x²
= 3 + 2√3 + 1 + 4 + 4/(3 + 2√3 + 1 )
= 8 + 2√3 + 4/4 + 2√3
= (8 + 2√3)(4 + 2√3 ) + 4/ 4 + 2√3
= 48 + 24√3/4 + 2√3
= 24( 2 +√3)/2( 2 +√3)
= 12
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