Question

Помогите пожалуйста! ​

Answer 1

$4x {}^{2} - 36 = 0 \mid:4 \\ x {}^{2} - 9 = 0 \\ x {}^{2} = 9 \\ x = \pm \sqrt{9} \\ \boxed{x_{1} = 3~~~~~~~~x_{2} = - 3 }$