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.

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

(−1.5,5.75)

1 answer

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

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

To solve this quadratic equation, we can use the quadratic formula:

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

where \(a = 1\), \(b = 3\), and \(c = 8\). First, we calculate the discriminant (\(b^2 - 4ac\)):

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

Since the discriminant is negative (\(-23\)), this means the quadratic does not cross the x-axis, and therefore there are no x-intercepts.

The correct response is:

There is no x-intercept.