Question

${ \times }^{2} - 8 \times - 9 = 0$
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Answer 1

Respuesta:

X1= 9

x2= -1

Explicación paso a paso:

${x}^{2} - 8x - 9 = 0 \\ (x - 9)(x + 1) \\ \\ x - 9 = 0 \\ x = 9 \\ \\ x + 1 = 0 \\ x = - 1$