Question

-x^2+4=0 срочно помогите

Answer 1

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

Answer 2

$-x^{2}+4=0$

$4-x^{2}=0$

$(2-x)(2+x)=0=>\left \[[{ {{2-x=0} \atop {2+x=0}} \right. =>\left \[[{ {{x_1=2} \atop {x_2=-2}} \right.$

Ответ:  {-2;  2}