Question

The square root of (7+3√5) (7-3√5) is_​

Answer 1

Answer:

2

Step-by-step explanation:

$\\ \sf\hookrightarrow \sqrt{ (7 + 3 \sqrt{5} )(7 - 3 \sqrt{5}) } \\ \\ \sf\hookrightarrow \sqrt{ {7}^{2} - {(3 \sqrt{5)} }^{2} } \\ \\ \sf\hookrightarrow \sqrt{49 - (9 \times 5)} \\ \\ \sf\hookrightarrow \sqrt{49 - 45} \\ \\ \sf\hookrightarrow \sqrt{4} \\ \\ \sf\hookrightarrow 2$