Graph the quadratic y=x2+3x+8 . What is the x-intercept(s)?(1 point)

Responses

There is no x-intercept.
There is no x -intercept.

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

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

−1.5

1 answer

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

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

We can use the quadratic formula:

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

In our equation, \( a = 1 \), \( b = 3 \), and \( c = 8 \). Plugging these values into the formula:

  1. Calculate the discriminant \( b^2 - 4ac \):

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

Since the discriminant is negative, this means the quadratic has no real roots. Therefore, there are no x-intercepts.

Thus, the correct response is:

There is no x-intercept.