Question

(k+7)^2=289

Answer 1

remember: sqrt(289) has TWO solutions

Answer 2

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Answer 3

Someone has deleted a reply from above - the reply was good - I just wanted you to be aware that there are 2 solutions.
(There nearly always are 2 solutions when you have a 'squared' term in your equation.

Answer 4

It will have a +/- solution.

sqrt(289) = +/- 17

Answer 5

As 17^2 and (-17)^2 both yield 289 as a solution.