what are the solutions to the quadratic equation x2 – 16 = 0?
x = 2 and x = –2
x = 4 and x = –4
x = 8 and x = –8
x = 16 and x = –16
x = 2 and x = –2
x = 4 and x = –4
x = 8 and x = –8
x = 16 and x = –16