Question

Which equations are true for x = –2 and x = 2? Select two options x2 – 4 = 0 x2 = –4 3x2 + 12 = 0 4x2 = 16 2(x – 2)2 = 0

Answer 1

x^2 - 4 = 0
4x^2 = 16

The first equation is true when x = -2 or x = 2, because substituting either of these values into the equation results in a true statement. The second equation is also true when x = -2 or x = 2, because substituting either of these values into the equation results in a true statement. The other three equations are not true when x = -2 or x = 2, because substituting these values into the equations results in false statements.