SOLUTION: How can I solve for the value(s) of the variable of 2s^2-98=0?

Either of two ways:

First way:



Divide both sides by 2:



Factor the left side as the difference of squares:



Use the zero-factor principle:

; 
  ;    ;

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Second way:



Add +98 to both sides:



Divide both sides by 2:



Use the principle of square roots:





Either way, the values of the variable s are 7 and -7.


Edwin