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2014-01-29T15:19:35+02:00
Δ = b² -4ac = 9 - 4 · 18 · (-10) = 9 + 720 = 729 > √Δ = 27

   x_{1}  \frac{3+27}{36} = \frac{30}{36} = \frac{5}{6}

   x_{2} = \frac{3-27}{36} = - \frac{24}{36} = - \frac{2}{3}

 18x² -3x-10 = 18 ·( x-x1) · ( x-x2) = 18 ( x- \frac{5}{6} ) · (x+  \frac{2}{3}

                      = ( 6x - 5 )( 3x + 2)