Use the discriminant to determine how many and what kind of solutions the quadratic equation 2x^2-4x=-2 has

1 answer

To determine the number and type of solutions for the quadratic equation \( 2x^2 - 4x = -2 \), we first need to rearrange it into standard form, which is \( ax^2 + bx + c = 0 \).

Starting with the given equation: \[ 2x^2 - 4x + 2 = 0 \]

Now we identify the coefficients:

  • \( a = 2 \)
  • \( b = -4 \)
  • \( c = 2 \)

Next, we calculate the discriminant \( D \) using the formula: \[ D = b^2 - 4ac \]

Substituting in the values of \( a \), \( b \), and \( c \): \[ D = (-4)^2 - 4(2)(2) \] \[ D = 16 - 16 \] \[ D = 0 \]

The discriminant \( D \) is 0, which indicates that there is exactly one real solution (also called a double root) for the quadratic equation.

In summary:

  • The quadratic equation \( 2x^2 - 4x + 2 = 0 \) has one real solution (a double root).