How do you solve (2k-1)^2=9?

1 Answer
Will
Aug 16, 2016

k= 2 or k = -1

Explanation:

you can take the square root from both sides but you must remember that there will be two possible options. Either the value will be positive or negative so
2k-1 = 3 or 1-2k = 3
2k= 4 or -2k = 2
k= 2 or k = -1

then we plug both in and see if they work
and they both indeed do.

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