Which of the following equations has a root in common with x^2−4x+4=0 ?
Choose the correct choice from the following options.
A) x^2-1=0
B) x^2-2=0
C) x^2-3=0
D) x^2-4=0
E) x^2-5=0
If we carefully look at the given equation we can arrange it in the following manner:   (x-2)^2= 0   so the two root is 2.   Now put 2 in given equations. The equation in which one of them gives value 0, that will be our answer.   (A) putting 2: we get 3. Reject this option.   (B) putting 2: we get 2. Reject this option.   (C) putting 2: we get 1. Reject this option.   (D) putting 2: we get 0. This is the equation, no need to check other option.   x^2-4=0 is the answer.
<result>D</result>
Which of the following equations has a root in common with x^2−4x+4=0 ?