Question

AnswerAnswer ques of attachment​

Answer 1

Answer:

-7√30

Step-by-step explanation:

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Answer 2

Heya mate!!

$\frac{ \sqrt{7} - \sqrt{5} }{ \sqrt{7} + \sqrt{5} } \times \frac{ \sqrt{7} - \sqrt{5} }{ \sqrt{7} - \sqrt{5} } = \frac{12 - 2 \sqrt{35} }{2} = 6 - \sqrt{35} \\ 6 - \sqrt{35} + 6 + \sqrt{35} = 12$

Hope it helps u dear✌️✌️