+2651 One of the five quadratics below has a repeated root. (The other four have distinct roots.) What is the repeated root?
x^2 - 2x + 1
x^2 - 4x - 4
x^2 + 6x - 9
x^2 + 26x + 25
x^2 - 5x + 4
+1790 Alright, we just need to find the one with something in the form of (x-a)^2.
First, we have x^2-2x+1. That can be factored to (x-1)^2.
Well, there's our answer. The others have distinct roots.
Thanks! :)
+1790 Alright, we just need to find the one with something in the form of (x-a)^2.
First, we have x^2-2x+1. That can be factored to (x-1)^2.
Well, there's our answer. The others have distinct roots.
Thanks! :)
