Resposta :
4x² = 144
x² = 144
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4
x² = 36
x = √36
x = ± 6
x = - 6 , + 6
Letra E
[tex]\large\boxed{\begin{array}{l} \rm{4x {}^{2} = 144 } \\ \\ \rm{x {}^{2} = 36} \\ \\ \rm{x = \pm6} \\ \\ \boxed{ \boxed{ \rm{x_1 = - 6 \:, \: x_2 = + 6 }}} \leftarrow \textsf{Letra E}\end{array}}[/tex]