[tex]2x^{2}-0,5x\\\\\\dla \ \ x = -1\\\\2x^{2}-0,5x = 2\cdot(-1)^{2}-0,5\cdot(-1) = 2\cdot1 + 0,5 = 2+0,5 = 2,5\\\\\\dla \ x = 0\\\\2x^{2}-0,5x = 2\cdot0^{2}-0,5\cdot0 = 0\\\\\\dla \ x = 1\\\\2x^{2}-0,5x = 2\cdot1^{2}-0,5\cdot1 = 2\cdot1 - 0,5 = 2-0,5 = 1,5[/tex]
