One of the five quadratics below has a repeated root. (The other four have distinct roots.) What is the repeated root? −x2+18x+813x2−6x+98x2−32x+3225x2−30x−9x2−14x+196
The repeated root comes from
8x^2 -32x + 32 = 0
8 ( x^2 - 4x + 4) = 0
x^2 - 4x + 4 = 0
(x - 2)^2 = 0
The repeated root is x = 2
