Question

Determina las raíces de las siguientes ecuaciones cuadráticas mediante una gráfica
${x}^{2} - {4}x - 5 = 0$


${x}^{2} - {4}x + 4 = 0$


${x}^{2} - 2x = 0$


${x}^{2} - 4 = 0$


${x}^{2} - x - 6 = 0$
help me​

Answer 1

Respuesta:

1)

(x-5)(x+1) = 0

x- 5 = 0

x = 5

x + 1 = 0

x = -1

2)

(x-2)(x-2) = 0

(x-2)^2 = 0

x - 2 = 0

x = 2

3)

${x}^{2} - 2x = 0$

${x}^{2} = 2x$

x = 2

4)

${x}^{2} - 4 = 0$

${x}^{2} = 4$

x = -2 , x = 2

5)

${x}^{2} - x - 6 = 0$

(x-3)(x+2) = 0

x-3 = 0

x = 3

x + 2 = 0

x = -2