Factor

0 = 5x² + 30x-10

Faktor

$0 = 5x² + 30x-10\\0=5(x^2+6x-2)$ 

.                   p         q

$0=5(x-x_1)(x-x_2)$ 

$x_{1,2}=-\frac{p}{2}\pm\sqrt{(\frac{p}{2})^2-q}$

$x_{1,2}=-3\pm\sqrt{9+2}\\x_1=-3+\sqrt{11}\\x_2=-3-\sqrt{11}$

$0=5(x-\sqrt{11}+3)(x+\sqrt{11}+3)$

$0=5(x-0.3166...)(x+6.3166...)$

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