September 23rd, 2018, 11:12 PM  #1 
Newbie Joined: Sep 2018 From: Mia Posts: 2 Thanks: 0  Help
radical 50 + radical 80 = I know the answer is 7 radical 2 radical 50 is 5 radical 2 and 8 is 2 radical 2 5 radical 2 + 2 radical 2 = 7 radical 2 But why does both 2 inside the radical add up to 2? 
September 23rd, 2018, 11:37 PM  #2 
Senior Member Joined: Sep 2015 From: USA Posts: 2,631 Thanks: 1470 
I assume you mean 8 and not 80 $\sqrt{50}+\sqrt{8} = \\ 5\sqrt{2} + 2\sqrt{2} = \\ (5 + 2)\sqrt{2} = \\ 7\sqrt{2}$ 

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