Question

(?-1)² = 8 - √28 find the value of

Answer 1

? will be

$\sqrt{7}$

So ,

(_/7-1)^2=

$8 - \sqrt{28}$

Answer 2

Heya

______________________________

( ab )² = a² × b²

=>

( ? - 1 )² = 8 - √{28}

?² = 8 - √28

? = √{8 - √28 }