The number obtained on rationalising the denominator of 1/√5-2 is
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Step-b=1/√5-2 rationalise it
= 1/√5-2×√5+2/√5+2
=√5+2/(√5)^2-(2)^2
=√5+2/5-4
=√5+2 ..
Hope this helps you ☺
y-step explanation:
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