If a = √2 + 1 then find ( a - 1/a )²
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Hey your answer is 3+2√2
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mounika30:
yes
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a = 2^1/2 + 1
b= 1 /2^1/2 +1 ×2^1/2-1 = 2^1/2 -1
(a + b)^2=(2^1/2+1_2^1/2+1)^2
=(1+1)^2
=(2)^2
=4 answer
b= 1 /2^1/2 +1 ×2^1/2-1 = 2^1/2 -1
(a + b)^2=(2^1/2+1_2^1/2+1)^2
=(1+1)^2
=(2)^2
=4 answer
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