16 is the correct answer I believe because the double negative is canceled out.
The particular identity you want to use is

Then

Expand the binomial to get

Use the identity again to write

and so


The third choice , i mean you always have to go with c
Answer:
The answer to your question is: x = 2.41
Step-by-step explanation:
2x³ = 28
x³ = 28/2
x³ = 14
x = ∛14
x = 2.41
An outside angle is equal to the sun of the two opposite inside angles.
The given inside angle is 75, the angle next to it is also 75 ( because there is a single line through the red arc, this means the angles are identical).
W = 75 + 75
W = 150 degrees.