Use completing square to find the solutions of the equations.
a. x^2+2x-2=0 b. x^2-6x=1
x^{2}+2x+1=3
(x+1)^{2} = (√3)^{2}
x+1 = ±√3
x= -1±√3
x^{2}-6x+9 =10
(x-3)^{2} =(√10)^{2}
x-3 = ±√10
x= 3 ±√10
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