(х+2)×(х-7) > 0
x²-7x+2x-14>0
x²-5x-14>0
D=25-4*(-14)=25+4*14=81
x1 = (5+9)/2 = 7
x2 = (5-9)/2 = -2
x > 0 при х є (-∞:-2)U(7;+∞)
(х+2)×(х-7) > 0
x²-7x+2x-14>0
x²-5x-14>0
D=25-4*(-14)=25+4*14=81
x1 = (5+9)/2 = 7
x2 = (5-9)/2 = -2
x > 0 при х є (-∞:-2)U(7;+∞)