rozwiaz rownianie : (x-3) (7-5x) +3 - 11x <-5(x-1)(x+3) + 12x mi ciagle wychodzi zle pomocy daje naj .

(x-3)(7-5x)+3-11x+5(x-1)(x+3)-12x<0 7x-5x^2-21+15x+3-11x+5(x^2+3x-x-3)-12x<0 -5x^2-x-18+5x^2+15x-5x-15<0 9x-33<0 9x<33 x<3/11

[latex](x - 3)(7 - 5x) + 3 - 11x extless -5(x - 1)(x+3) + 12x\\7x - 5x^{2}-21+15x + 3 - 11x extless -5(x^{2}+3x-x-3)+12x\\-5x^{2}+11x-18 extless -5(x^{2}+2x-3) + 12x\\-5x^{2}+11x-18 extless -5x^{2}-10x+15+12x\\11x-18 extless 2x+15\\11x - 2x extless 15 + 18\\9x extless 33 /:9\\x extless 3frac{2}{3} [/latex]