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  Ashton estimates the square root of 72 in the following way:

 

√72,= 2√36=2*6=12

 

why is his reasoning incorrect?

 Apr 18, 2019
 #1
avatar+106519 
+1

√72  =  √2 *√36     √2 * 6  =  6√2

 

 

cool cool  cool

 Apr 18, 2019
 #2
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why is his reasoning incorrect? 

 

Because he took the 2 out from under the radical without square rooting it. 

 

 

!

 Apr 18, 2019

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