Здравствуйте.Помогите пожалуйста 1. x2 + 2x – 3 = 0
D =
x2 =
x1 + x2 =
x2 + 5x – 36 = 0
D =
x2 =
x1 + x2 =
x2 – 10x + 21 = 0
D =
x2 =
x1 + x2 =
x2 – 8x + 15 = 0
D =
x2 =
x1 + x2 =
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