Question

решите графически уравнение х^2-2х-3=0
30 Б!!!!

Answer 1

x²-2x-3=0
D=4-4×1×(-3)=4+12=16
x1=(2-4)÷2=-1
x2=(2+4)÷2=3
Ответ: -1; 3

Answer 2

${x}^{2} - 2x - 3 = 0 \\ d = 4 + 4 \times 3 \times 1 = 4 + 12 = 16 = {4}^{2} \\ x1 = \frac{2 + 4}{2} = 3 \\ x2 = \frac{2 - 4}{2} = - 1$