prove that 5 + root 9 is rational
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let us consider 5+root 9 as rational
then (5+root9)-5 is a rational
root9 is rational.
but this contradicts the fact that root9 is irrational.
this contradiction has arisen by assuming 5+root9 as rational.
hence 5+root9 is irrational.
then (5+root9)-5 is a rational
root9 is rational.
but this contradicts the fact that root9 is irrational.
this contradiction has arisen by assuming 5+root9 as rational.
hence 5+root9 is irrational.
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