+0  
 
0
175
1
avatar+558 

Solve for a.

 Jan 26, 2018
 #1
avatar
+1

5a^2 = 320      divide both sides by 5

a^2 = 64          take the square root of both sides

a =sqrt(64)

a = +8 or -8

 Jan 26, 2018

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