3 1/2
Объяснение:
2х²+7х-4= 0
(через дискриминант)
D= 49-4×2×(-4) = 49+32 = √81 = 9
x1 = -7+9/4 = 2/4 = 1/2
x2 = -7-9/4 = -16/4 = -4
|1/2-4| = |-7/2| = 7/2 = 3 1/2
1/2 - 8/2 = - 7/2
3 1/2
Объяснение:
2х²+7х-4= 0
(через дискриминант)
D= 49-4×2×(-4) = 49+32 = √81 = 9
x1 = -7+9/4 = 2/4 = 1/2
x2 = -7-9/4 = -16/4 = -4
|1/2-4| = |-7/2| = 7/2 = 3 1/2
1/2 - 8/2 = - 7/2