X= plus or minus 1
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(x-12)2 using perfect square
Using the quadratic formula you get z≅4.91547594742265 or z≅-0.91547594742265
If you mean: x squared -x -56 = 0 then using the quadratic equation formula x = 8 or x = -7
It is: (3x+4)(2x-3) when factored
When you are using non-standard definitions of "plus" and "minus", or of "equal".