Question

4x2 – 12x + 9 = 0 fórmula general
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Answer 1

Tema : ecuacion cuadratica

usamos la formula general

$x = \frac{ - b \: \pm \: \sqrt{ {b}^{2} - 4ac} }{2a}$

Resolvemos:

$x = \frac{ - ( - 12) \pm \: \sqrt{ ({ - 12})^{2} - 4(4)(9)} }{2(4)}$

$x = \frac{12 \pm \: \sqrt{144 - 144} }{8}$

$x = \frac{12 \pm 0}{8}$

$x1 = \frac{12 + 0}{8} = \frac{12}{8} = \frac{3}{2} = 1.5$

$x2 = \frac{12 - 0}{8} = \frac{12}{8} = \frac{3}{2} = 1.5$

x1=1.5

x2=1.5