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

Responses

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

−1.5
negative 1.5

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

(−1.5,5.75)

1 answer

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

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

We can use the quadratic formula, where \( a = 1 \), \( b = 3 \), and \( c = 8 \):

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

Calculating the discriminant:

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

Since the discriminant is negative (\(-23\)), the quadratic equation has no real solutions. Therefore, there are no x-intercepts.

Conclusion:

The correct response is: There is no x-intercept.

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