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Answer 1

3x^2-6x-2 by using completing square
divide by 3
3x^/3-6x/3-2/3
x^2-2x=2/3
multiply 1/2to the -2
x^2-1=2/3
x^2-x+1^2=2/3+1^2
(x-1)^2=2/3+1
x-1) = 2+3/3
x-1)^2=5/3
X -1 = ✓5/3
taking value -5/3 root and +5/3 root