Question

Simplify simplify simplify simplify simplify ​

Answer 1

Step-by-step explanation:

1

$= > 4 + 3 \sqrt{5} + 2 - 2 \sqrt{5} \\ = > 6 + \sqrt{5}$

2

$= > {(5 - 2 \sqrt{3}) }^{2} \\ = > 25 + 12 - 20 \sqrt{3} \\ = > 37 - 20 \sqrt{3}$

3

$= > \frac{5 \sqrt{48} }{3 \sqrt{27} } \\ = > \frac{20 \sqrt{3} }{9 \sqrt{3} } \\ = > \frac{20}{9}$

4

$= > \frac{3 \sqrt{98} }{2 \sqrt{32} } \\ = > \frac{21 \sqrt{2} }{8 \sqrt{2} } \\ = > \frac{21}{8}$

5

$= > (7 + 6 \sqrt{2} )(7 - 6 \sqrt{2}) \\ = > 49 - 72 \\ = > - 23$