Question 414392
You're squaring it no matter what. In the first example, you squared -2 to get 



{{{(-2)^2=(-2)*(-2)=4}}}



In the second example, you should have squared -3s to get 



{{{(-3s)^2=(-3s)(-3s)=(-3*(-3))*(s*s)=9s^2}}}



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