Ответы и объяснения

2012-04-03T18:59:12+00:00

х^2 + 11/2 х -3 >0

 х^2 + 5,5х -3 >0 

1x2 + 5.5x - 3 = 0
Делим на 0.5:
2x2 + 11x - 6 = 0
D = b2 - 4ac
D = 121 + 48 = 169 = 13^2

x1,2 = -b ± √D/2a
x1 = -11 + 13/4 = 2/4 = 1/2
x2 = -11 - 13/4 = - 24/4 = -6
Ответ: x1 = 1/2 ; x2 = -6