Question

please answer 7th question

Answer 1

the answer will be 52

Answer 2

Hey Future Mathematicians,

Rationalizing the Denominator,

Rationalizing factor is
$3 + \sqrt{7}$

Rationalizing, we get,
$\frac{3 + \sqrt{7} }{3 - \sqrt{7} } \times \frac{3 + \sqrt{7} }{3 + \sqrt{7} }$
${ \frac{(3 + \sqrt{7)} }{(3 + \sqrt{7)(3 - \sqrt{7)} } } }^{2}$
Using the formulas,

1) (x+y)1=x²+y²+2xy

2) (x+y)(x-y)=x²-y²

$\frac{16 + 6 \sqrt{7} }{9 - 7}$
$\frac{16 + 6 \sqrt{7} }{2}$
Thanks!!