For which of the following equations is it true that the sum of the roots equals the product of the roots?

I need to know HOW to do this. step by step would be beneficial, thanks.





(A) x^2-4=0


(B)x^2-2x+1=0


(C)x^2-4x+4=0


(D)X^2-5x+6=0


(E)x^2+4x+4=0For which of the following equations is it true that the sum of the roots equals the product of the roots?
x^2-4x+4=0





(x-2)(x-2) = 0





the roots are both 2





2*2 = 2+2