Odpowiedzi

2009-11-23T16:11:08+01:00
(x-2)(x+3) ≥ (x-5)(x-6)
x²+3x-2x-6 ≥ x²-6x-5x+30
3x+6x+5x ≥ 30+6
14x ≥ 36 /:14
x ≥ 36/14
x ≥ 2,57
2009-11-23T16:42:45+01:00
(x-2)(x+3) = (x-5)(x-6)
2x+3x-2x-6 = 2x-6x-5x+30
3x-6 = -9x+30
3x+9x = 30+6
12x = 36 /:12
x = 3