Answer:
x= 1
x= -1
Step-by-step explanation:
[tex] - 4x^{2} - 7 = - 11 \\ subtract \: both \: sides \: by \: 7 \\ \\ - 4x^{2} = - 4 \\ divide \: both \: sides \: by \: - 4 \\ \\ x^{2} = \frac{ - 4}{ - 4} \\ divide \: - 4 \: to \: - 4 \\ \\ x ^{2} = 1 \\ take \: square \: root \: of \: both \: sides \: of \\ the \: equation \\ \\ x = 1 \\ x = - 1[/tex]
