Question

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Answer 1

Explicação passo-a-passo:

${9x}^{2} - 63x - 24 = - 132$

${9x}^{2} - 63x - 24 + 132 = 0$

${9x}^{2} - 63x + 108 = 0$

${x}^{2} - 7x + 12 = 0$

$x = \frac{ - ( - 7)± \sqrt{ {( - 7)}^{2} - 4 \times 1 \times 12} }{2 \times 1}$

$x = \frac{ - ( - 7)± \sqrt{ {( - 7)}^{2} - 4 \times 12} }{2 \times 1}$

$x = \frac{ - ( - 7)± \sqrt{ {( - 7)}^{2} - 4 \times 12 } }{2}$

$x = \frac{7± \sqrt{ {( - 7)}^{2} - 4 \times 12 } }{2}$

$x = \frac{7± \sqrt{49 - 4 \times 12} }{2}$

$x = \frac{7± \sqrt{49 - 48} }{2}$

$x = \frac{7± \sqrt{1} }{2}$

$x = \frac{7±1}{2}$

$x = \frac{7 + 1}{2} \\ x = \frac{7 - 1}{2}$

$x = 4 \\ x = 3$

$\red {x_{1} = 3} \\ \red {x_{2} = 4}$