Question

Why are there two solutions for the equation x2=4

Answer 1

Answer:

${x}^{2} = 4 \\ {x}^{2} - 4 = 0 \\ {x}^{2} - {2}^{2} = 0 \\ (x - 2)(x + 2) = 0 \\ x = 2 \: or \: x = - 2$