Question

como lo resuelvo paso a paso
$- 3 { \times }^{2} + 45 = - 30$
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Answer 1

Explicación:

$- {3x}^{2} + 45 = - 30 \\ - {3x}^{2} = - 30 - 45 \\ - {3x}^{2} = - 75 \: \: \: \: \: \: \: \: \: \: \: \: \times ( - 1) \\ 3 {x}^{2} = 75 \\ {x}^{2} = \frac{75}{3} \\ {x}^{2} = 25 \\ \sqrt{ {x}^{2} } = \sqrt{25 } \\ x _{1} = - 5 \: . \: \: \: x_{2} = 5$