If a=3-2root2 , find the value of a square +1/a square
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1
Answer:
2
Step-by-step explanation:
sub a = 3 - 2 root 2 into a²+1 / a²
⇒(3-2 root 2)² + 1 / (3-2 root 2)²
=9 - 8 + 1 / 9 - 8
=2 / 1
=2
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