Write the factors of a^2-1/a^2
krsumitanand:
if the question is a square minus 1 by a square then the required factor will be 1 + 1 by a into 1 minus 1 by a
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Solution :
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We know the algebraic identity
x² - y² = (x+y)(x-y)
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Now ,
a² - 1/a²
= a² - (1/a)²
= ( a + 1/a )( a - 1/a )
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