Rationalise the denominator 1/9√-√8
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Step-by-step explanation:
1/√9-√8
we multiply and divide by √9+√8,we get
=1/√9-√8 ×√9+√8/√9+√8
=√9+√8/(√9)^2-(√8)^2. [we used identity
a^2-b^2=(a+b)(a-b) ]
=√9+√8/9-8
=√9+√8/1
=√9+√8
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