One of the five quadratics below has a repeated root. (The other four have distinct roots.) What is the repeated root? \( -x^2 + 18x + 81 \\ 3x^2 - 6x + 9 \\ 8x^2 - 32x + 32 \\ 25x^2 - 30x - 9 \\ x^2 - 14x + 196 \)
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
