Question

find the real number whose product with irrational number ,4-√3 is 39

Answer 1

let the real number be x
4-√3* x = 39
x= 39/4-√3
let us take √3=1.73
39/4-1.73=
39/2.27
=17.18

Answer 2

$x \times (4 - \sqrt{3 } ) = 39 \\ x = 39 \div (4 - \sqrt{3} )....after \: rationalisation \\ you \: will \: get \: \\ 12 + 3 \sqrt{3} ........... \\ i \: hope \: this \: answer \: is \: helpful \: ......if \: you \: are \: having \: issues \: with \: rationalisation \: practice \: some \: questions \: from \: a \: book$