Question

1/7+5√2 rationalize​

Answer 1

Answer:

it is already rationalized

Answer 2

HERE IS YOUR ANSWER ⤵

$\frac{1}{7 + 5 \sqrt{2} } \times \frac{7 - 5 \sqrt{2} }{7 - 5 \sqrt{2} }$
Just multiply the denominator after changing its sign i.e as it is +ve then use -ve sign......

$\frac{7 - 5 \sqrt{2} }{ {7}^{2} - ({5 \sqrt{2}) }^{2} }$


[As ( a+b) (a-b) = a²-b²]

Now ........
$\frac{7 - 5 \sqrt{2} }{49 - (25 \times 2)}$
$\frac{7 - 5 \sqrt{2} }{49 - 50}$
$\frac{7 - 5 \sqrt{2} }{ - 1}$
- (7- 5√2)
-7 +5√2

HOPE THIS HELPS U......❤❤❤