http://prntscr.com/aazygw
This one is simple. For B, I just want to know how they got x=4. It seems I need my memory refreshed. I forgot how to multiple a radical with a radical with a whole number in front of it. Mind explaining?

Question

http://prntscr.com/aazygw
This one is simple. For B, I just want to know how they got x=4. It seems I need my memory refreshed. I forgot how to multiple a radical with a radical with a whole number in front of it. Mind explaining?

kikuo · Answer

@Directrix

directrix · Answer

The hypotenuse with length x = √2 * (2√2)

√2 * (2√2)=  2 * √2  * √2

 2 * √2  * √2 = 2 * √4

2 * √4 = 2 * 2 = 4

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So, √2 * (2√2) = 4

@Kikuo