SOLUTION: Please help . and show work . solve equation with radicals k = square root of k^2 - 5k -15

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Question 167470This question is from textbook beginning Algebra
: Please help . and show work . solve equation with radicals
k = square root of k^2 - 5k -15 This question is from textbook beginning Algebra

Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
k+=+sqrt%28k%5E2+-+5k+-15%29
k%5E2=k%5E2+-+5k+-15
-5k-15=0
-5k=15
k=-3
but k=-3 is not a solution because is <0
then the equation has no solution