[tex] {3x}^{2} - 10 = - 37 \\ = > {3x}^{2} = - 37 + 10 \\ = > {3x}^{2} = - 27 \\ = > {x}^{2} = \frac{ - 27}{3} \\ = > {x}^{2} = - 9 \\ = > x = \sqrt{ - 9} \\ = > x = - 3 \: \: or \: \: \: 3[/tex]
x = -3 or 3
Hope it helps.
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