Explicação passo-a-passo:
[tex]\blue {{ _{\heartsuit} } \heartsuit_{\heartsuit} } \: \: \mathsf {OI, TUDO \: \: J\acute{O}IA \: ? \: \:\blue {{ _{\heartsuit} } \heartsuit_{\heartsuit} } }[/tex]
a)
[tex] \sf{ {x}^{2} - 169 = 0} \\ \sf{ {x}^{2} = 169 } \\ \sf{x = \pm\sqrt{169} } \\ \boxed{\red{ \sf{ x_{1} = 13}}} \\ \boxed{\red{ \sf{ x_{2} = - 13}}}[/tex]
b)
[tex] \sf{ {x}^{2} + 64 = 0} \\ \sf{ {x}^{2} = - 64 } \\ \sf{ x = \sqrt{ - 64} } \\ \boxed{\red{ \sf{x \notin \: \mathbb{R}}}}[/tex]
[tex]\mathcal{ATT : ARMANDO}[/tex]
[tex]\mathfrak{\small03\diagup01\diagup2021} \\ \mathfrak{\small{8} :{25} \: \: pm}[/tex]
