Which of the following is a solution to the linear-quadratic system:

y=x^2+3x−13


y=5


(1 point)
Responses

(−6, 3)
(−6, 3)

(3, 5)
(3, 5)

(6, 5) and (−3, 5)
(6, 5) and (−3, 5)

(3, 5) and (-6, 5)

1 answer

To find the solutions to the system given by the equations \( y = x^2 + 3x - 13 \) and \( y = 5 \), we can set them equal to each other.

  1. Substitute \( y = 5 \) into the first equation: \[ 5 = x^2 + 3x - 13 \]

  2. Rearranging the equation gives: \[ x^2 + 3x - 13 - 5 = 0 \implies x^2 + 3x - 18 = 0 \]

  3. Next, we can factor the quadratic: \[ (x + 6)(x - 3) = 0 \] This gives us the solutions: \[ x + 6 = 0 \implies x = -6 \] \[ x - 3 = 0 \implies x = 3 \]

  4. Now, we have two \( x \) values: \( x = -6 \) and \( x = 3 \). Since both solutions correspond to \( y = 5 \), the points of intersection (solutions to the system) are: \[ (-6, 5) \text{ and } (3, 5) \]

Looking at your response options, the answer matches with (3, 5) and (-6, 5).

Thus, the correct answer is: (3, 5) and (-6, 5).