Answer:
i) x ≈ -0.2 or x ≈ 1.2
ii) x ≈ -0.5 or x ≈ 1.5
Explanation:
y = 4x^2-4x-1
that means 4x^2-2-4x-1 can be also considered as y
so 4x^2-2-4x-1 = 0 can be considered as y = 0
same goes to 4x^2-2-4x-1 = 2 which is considered as y = 2
since y = 0 and y = 2
we draw a horizontal like at y = 0 and y = 2
then you can determine which points the blue drawn parabola touches the horizontal line drawn
the co-ordinates would be written in (x,y)
i) (-0.2,0) and (1.2,0)
ii) (-0.5,2) and (1.5,2)