х²+3х-0,5=0х₁=
-3+√(9+2) =
-3+√11 2 2
х₂=
-3-√(9+2) =
-3-√11 2 20,5х²-х-3=0х₁=
1+√(1+6) = 1+√7
1
х₂=
1-√(1+6) = 1-√7
2 -2х²-3х+1=0 2х²+3х-1=0х₁=
-3+√(9+8) =
-3+√17 2 2
х₂=
-3-√(9+8) =
-3-√17 2 2х²+х+2=0х₁=
-1+√(1-8) дискриминант отрицательный, решений нет
2
5х²-4х-8=0х₁=
4+√(16+160) =
4+√176 =
4+4√11 = 0,4+0,4√11 10 10 10
х₂=
4-√(16+160) =
4-√176 =
4-4√11 = 0,4-0,4√11
10 10 10х²-2х+7=0х₁=
2+√(4+28) =
2+√32 =
2+2√8 = 1+√8
2 2 2
х₂=
2-√(4+28) =
2-√32 =
2+2√8 = 1-√8 2 2 2-3х²-11х+4=03х²+11х-4=0х²+3х-0,5=0х₁=
-3+√(9+2) =
-3+√11 2 2
х₂=
-3-√(9+2) =
-3-√11 2 20,5х²-х-3=0х₁=
1+√(1+6) = 1+√7
1
х₂=
1-√(1+6) = 1-√7
2 -2х²-3х+1=0 2х²+3х-1=0х₁=
-3+√(9+8) =
-3+√17 2 2
х₂=
-3-√(9+8) =
-3-√17 2 2х²+х+2=0х₁=
-1+√(1-8) дискриминант отрицательный, решений нет
2
5х²-4х-8=0х₁=
4+√(16+160) =
4+√176 =
4+4√11 = 0,4+0,4√11 10 10 10
х₂=
4-√(16+160) =
4-√176 =
4-4√11 = 0,4-0,4√11
10 10 10х²-2х+7=0х₁=
2+√(4+28) =
2+√32 =
2+2√8 = 1+√8
2 2 2
х₂=
2-√(4+28) =
2-√32 = 1-√8 2 2-3х²-11х+4=03х²+11х-4=0х₁=
-11+√(121+48) = -
11+√169 =
-11+13 =1/3 6 6 6х₂=
-11-√(121+48) = -
11-√169 = -
11-13 =-4 6 6 6