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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 - 30x + 32

25x^2 - 30x - 9

x^2 - 28x + 196

 Oct 16, 2022
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The repeated root is 4.

 Oct 16, 2022

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