Question

prove that 7√5 is rational numbers​

Answer 1

Answer:

$\frac{p}{q} \: is \: \: a \: rational \: no. \: where \: \: q \: is \: not \: equal \: to \: 0 \\ \\ \frac{p}{q} = 7 \sqrt{5} \\ \\ \frac{p}{7q} = \sqrt{5} \\ \\ its \: a \: rational \: no \: becoz \: by \: solving \: \sqrt{5} \: \\ \\ we \: will \: get \: \frac{p}{7q} \: which \: is \: rational \: no.$