Rooting all the way!!!!!!!!!!!

Algebra Level pending

$Find\quad the\quad value\quad of\quad \sqrt { 7+\sqrt { 40 } } \quad -\quad \sqrt { 7-\sqrt { 40 } }$

4\sqrt { 2 } \quad and\quad 2\sqrt { 6 }

2\sqrt { 3 } \quad and\quad 2\sqrt { 5 }

5\sqrt { 2 } \quad and\quad 2\sqrt { 11 }

2\sqrt { 2 } \quad and\quad 2\sqrt { 5 }

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