Question

x square - 4 equal to zero then X equal to

Answer 1

Answer:

${x}^{2} - 4 = 0 \\ {x}^{2} = 4 \\ x = \pm \sqrt{4} \\ x = \pm \: 2 \\ i.e. \: \: x = 2 \: or \: x = - 2$