помогите плиз. -4х в квадрате + 19х -12=0
-4x + 19x - 12 = 0
4x - 19x + 12 = 0
D = 169
x1 = -19 -13/-8 = 4
x2 = -19 +13/-8 = -0.75
-4x^2 + 19 -12=0
4x^2-19+12=0
d= 361-4*48=361-192=169
x1=19-13/8=0.75 x2=19+13/8=4