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radical 32- 7 radical 2 pls help i dont know how to do this

Best Answer 

 #1
avatar+4172 
+5

First, simplify the square root of 32.

\(\sqrt{32}-7\sqrt2\\~\\ =\sqrt{2\cdot2\cdot2\cdot2\cdot2}-7\sqrt2 \\~\\ =\sqrt{2\cdot2}\cdot\sqrt{2\cdot2}\cdot\sqrt2-7\sqrt2 \\~\\ =2\cdot2\cdot\sqrt2-7\sqrt2 \\~\\ =4\sqrt2-7\sqrt2\)

 

 

4 cookies - 7 cookies = -3 cookies.

\(4\sqrt2-7\sqrt2=-3\sqrt2\)

 

So..the most simplified form is:      \(-3\sqrt2\)      smiley

hectictar  May 4, 2017
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4+0 Answers

 #1
avatar+4172 
+5
Best Answer

First, simplify the square root of 32.

\(\sqrt{32}-7\sqrt2\\~\\ =\sqrt{2\cdot2\cdot2\cdot2\cdot2}-7\sqrt2 \\~\\ =\sqrt{2\cdot2}\cdot\sqrt{2\cdot2}\cdot\sqrt2-7\sqrt2 \\~\\ =2\cdot2\cdot\sqrt2-7\sqrt2 \\~\\ =4\sqrt2-7\sqrt2\)

 

 

4 cookies - 7 cookies = -3 cookies.

\(4\sqrt2-7\sqrt2=-3\sqrt2\)

 

So..the most simplified form is:      \(-3\sqrt2\)      smiley

hectictar  May 4, 2017
 #2
avatar+50 
+2

thanks that helped alot

also how you get the radical sign 

 #3
avatar+4172 
+4

I did it using the LaTeX button right next to the image button...

Erase the stuff that is already inside and then click the " Math " button in the top left. At the bottom of the list there is a little picture of a square root. You can just click that and then type the number that you want to go underneath between the {} s.

 

Also..you can copy and pase this: √[   ]

And just type what goes under between the parenthesees :)

 

Or.....you can just type sqrt(  ) laugh

hectictar  May 4, 2017
 #4
avatar+50 
+2

thx 

laugh


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