Question

B={XER / x²-4=0} va roooog ​

Answer 1

Răspuns:

${x}^{2} - 4 = 0 \\ {x}^{2} = 4 \\ x1 = \sqrt{4} \\ x1 = 2 \\ x2 = - \sqrt{4} \\ x2 = - 2$

B={-2;2}