Look at the picture before trying to solve.
solve 2x^2 - 6x = -8

2x^2 - 6x = 8

1. Divide the equation by 2
-> x^2-3x=4

2. Move the constant to the left
-> x^2 - 3x + 4 = 0

3. Use the quadratic formula
—> - - (3) +/- square root -(3)^2 - 4 x 1 x 4 divided by 2x1

4. Plug into the calculator

3 +/- square root 7 divided by 2
(Essentially the last one)

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Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.