7k^2-7k/5k-5

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Solution for 7k^2-7k/5k-5 equation: 


k in (-oo:+oo)

7*k^2-(((7*k)/5)*k)-5 = 0

7*k^2+(-7/5)*k^2-5 = 0

28/5*k^2 = 5 // : 28/5

k^2 = 25/28

k^2 = 25/28 // ^ 1/2

abs(k) = (25/28)^(1/2)

k = (25/28)^(1/2) or k = -(25/28)^(1/2)

k in { (25/28)^(1/2), -(25/28)^(1/2) }

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