[tex]2x(x+3)+5 = 3(x-1)\\\\2x^{2}+6x+5 = 3x - 3\\\\2x^{2}+6x-3x+5+3 = 0\\\\2x^{2}+3x+8 = 0\\\\a = 2, \ b = 3, \ c = 8\\\\\Delta} = b^{2}-4ac = 3^{2}-4\cdot2\cdot8 = 9 - 64 = -55 < 0[/tex]
Δ < 0, brak pierwiastków równania
