state whether there following numbers are rational or not (5+√5) (5-√5)
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Step-by-step explanation:
it is rational because
according to (a+b)( a-b)=a^2 - b^2
so the no. will be 5^2 -(√5)^2
= 25 - 5
= 20
and 20 is rational no.
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