Solve for k
k\in \left(-1,1\right)
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k^{2}+5k-1-5k<0
Subtract 5k from both sides.
k^{2}-1<0
Combine 5k and -5k to get 0.
k^{2}<1
Add 1 to both sides.
k^{2}<1^{2}
Calculate the square root of 1 and get 1. Rewrite 1 as 1^{2}.
|k|<1
Inequality holds for |k|<1.
k\in \left(-1,1\right)
Rewrite |k|<1 as k\in \left(-1,1\right).
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