Hi,        

solving the following using the Quadratic formula

3x^2-48=0   Note b = 0, in this example







  x = ± 4



Note: Solving by factoring

3x^2-48=0  

3(x^2-16)=0  

3(x-4)(x+4)=0  

(x-4)=0

   x = 4

(x+4)= 0

   x = -4 

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