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how do you solve 8a^2-72=0

 Jul 10, 2015

Best Answer 

 #1
avatar+21508 
+5

8a2 - 72  =  0

Add 72 to both sides:

8a2  =  72

Divide both sides by 8:

a2  =  9

Find the square root of both sides;

a  =  3     or     a  =  -3

 Jul 11, 2015
 #1
avatar+21508 
+5
Best Answer

8a2 - 72  =  0

Add 72 to both sides:

8a2  =  72

Divide both sides by 8:

a2  =  9

Find the square root of both sides;

a  =  3     or     a  =  -3

geno3141 Jul 11, 2015

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