jjcarmelojimenez17 jjcarmelojimenez17
  • 17-10-2019
  • Mathematics
contestada

What is the value of the discriminant of the quadratic equation −2x2 = −8x + 8, and what does its value mean about the number of real number solutions the equation has?

Respuesta :

carlosego
carlosego carlosego
  • 18-10-2019

For this case we have the following quadratic equation:

[tex]-2x ^ 2 = -8x + 8[/tex]

Rewriting we have:

[tex]2x ^ 2-8x + 8 = 0[/tex]

This equation is of the form [tex]ax ^ 2 + bx + c = 0[/tex]

Where:

[tex]a = 2\\b = -8\\c = 8[/tex]

The discriminant is given by:

[tex]d = b ^ 2-4 (a) (c)\\d = (- 8) ^ 2-4 (2) (8)\\d = 64-64\\d = 0[/tex]

This means that the equation has two equal real roots.

Answer:

[tex]d = 0[/tex]

The equation has two equal real roots.

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