Question

the product of two rational numbers is5/18. if one of them is-3/20, find the other number.​

Answer 1

Answer:

We know that the product of two rational numbers is $\frac{5}{18}$

let us assume that the two irrational numbers are $\frac{p}{q}$ and $\frac{a}{b}$

now, given that one of the rational numbers is $\frac{-3}{20}$ let us take $\frac{p}{q}$ as $\frac{-3}{20}$

then,

$\frac{a}{b}$ x $\frac{p}{q}$ = $\frac{5}{18}$

$\frac{a}{b}$ x $\frac{-3}{20}$ = $\frac{5}{18}$

$\frac{a}{b}$ = $\frac{5}{18}$ x$\frac{20}{-3}$

$\frac{a}{b}$ = $\frac{5}{9}$ x $\frac{-10}{3}$ = $\frac{-50}{21}$

so, $\frac{a}{b} = \frac{-50}{21} (or) \frac{8}{21} +(-2)$

Hope it helps xD