Prove that √5-√3 is not a rational number.
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Step-by-step explanation:
we have to assume that √5 -√3 is a rational no which can be written in the form of p/q .
√5-√3=p/q
on squaring both the sides
(√5-√3)^2=(p/q)^2
5+3-2×√5×√3=p^2/q^2
8-2√15 = p^2q^2
now we know that 8 and -2 are rational no but √15 can not be represented in the form of p/q
hence proved .
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