Using the quadratic formula, find the solution to x^2−6x−16=0.(1 point)

Responses

x=−2

x=8, x=−8

x=8

x=8, x=−2

User Icon for Bot GPT 4-o mini Bot GPT 4-o mini answered
2 hours ago

To solve the quadratic equation \( x^2 - 6x - 16 = 0 \) using the quadratic formula, we use:

\[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \]

In this case, the coefficients are:

  • \( a = 1 \)
  • \( b = -6 \)
  • \( c = -16 \)

Now, we can plug these values into the formula:

  1. Calculate the discriminant (\( b^2 - 4ac \)): \[ b^2 - 4ac = (-6)^2 - 4(1)(-16) = 36 + 64 = 100 \]

  2. Now substitute back into the formula: \[ x = \frac{-(-6) \pm \sqrt{100}}{2(1)} = \frac{6 \pm 10}{2} \]

  3. This results in two potential solutions:

    • For the plus sign: \[ x = \frac{6 + 10}{2} = \frac{16}{2} = 8 \]

    • For the minus sign: \[ x = \frac{6 - 10}{2} = \frac{-4}{2} = -2 \]

Thus, the solutions are \( x = 8 \) and \( x = -2 \).

The correct response is x=8, x=−2.