Problem of the Week 7-19-18: Invertible Matrix [Linear Algebra]

Check out this Problem of the Week.
Be sure to let us know how you solved it in the comments below or on social media!

Solution below:


Video:
*Note: In the video, k2 - 1 - 6(k - 1) reduces to k2- 6k + 5 NOT k2 - 6k - 5

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