Which of the following are solutions to the equation below? check all that apply. x2 - 16 = 0

I do not know if you mean x² or 2x, so here are both equations:

Equation 1:
x² - 16 = 0
x² = 16
x = √16
x = ±4
Solutions: x = 4 and x = -4

Equation 2:
2x - 16 = 0
2x = 16
x = 8
Solution: x = 8

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?