SOLUTION: Solve the quadratic equation: 2x^2 - 72 = 0 Please show steps as these are difficult for me to understand. Thank you.

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Solve the quadratic equation: 2x^2 - 72 = 0 Please show steps as these are difficult for me to understand. Thank you.      Log On


   

Question 665927: Solve the quadratic equation:
2x^2 - 72 = 0
Please show steps as these are difficult for me to understand. Thank you.
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
Starting with
2x%5E2+-+72+=+0
Factor out 2
2%28x%5E2+-+36%29+=+0+
...
Now the difference of squares is more easilty seen.
2(x-6)(x+6)=0
x-6=0, so x = 6
x+6=0, so x = -6
.....................
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