Graph the quadratic y=x^2+3x+8 . What is the x-intercept(s)?(1 point)

Responses

−1.5
negative 1.5

(0,8)
left parenthesis 0 comma 8 right parenthesis

(−1.5,5.75)
left parenthesis negative 1.5 comma 5.75 right parenthesis

There is no x-intercept.

1 answer

To find the x-intercepts of the quadratic equation \(y = x^2 + 3x + 8\), we need to set \(y\) to 0 and solve for \(x\):

\[ 0 = x^2 + 3x + 8 \]

This is a standard quadratic equation of the form \(ax^2 + bx + c = 0\). Here, \(a = 1\), \(b = 3\), and \(c = 8\).

We can determine the x-intercepts using the quadratic formula:

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

First, we need to calculate the discriminant (\(b^2 - 4ac\)):

\[ b^2 - 4ac = 3^2 - 4 \cdot 1 \cdot 8 = 9 - 32 = -23 \]

Since the discriminant is negative (\(-23\)), there are no real solutions to the equation, which means that there are no x-intercepts.

Therefore, the correct response is:

There is no x-intercept.