Graph the quadratic y=x2+3x+8

. What is the x-intercept(s)?(1 point)
Responses

−1.5
negative 1.5

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

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

(0,8)

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 quadratic equation in standard form \( ax^2 + bx + c = 0 \), where \( a = 1 \), \( b = 3 \), and \( c = 8 \).

We can use the discriminant to determine if there are any real x-intercepts. The discriminant \( D \) is given by:

\[ D = b^2 - 4ac \]

Substituting the values:

\[ D = 3^2 - 4(1)(8) = 9 - 32 = -23 \]

Since the discriminant is negative (\( D < 0 \)), this means that the quadratic does not intersect the x-axis and there are no real x-intercepts.

Thus, the response to the question about the x-intercept is:

There is no x-intercept.