Odpowiedzi

2009-12-02T17:57:48+01:00
2009-12-02T18:01:50+01:00
(-31)² + (-2)x (-4) = -4 /:(-4)
(-31)² + (-2)x = 0
961 + (-2)x = 0
(-2)x = -961 /:(-2)
x = -961 : (-2)
x = 480,5