Respuesta :
Answer:
The graph of y = 2x² + 5x + 9 has zero x-intercepts.
Step-by-step explanation:
x-intercepts are for y = 0.
Put y = 0 to the equation y = 2x² + 5x + 9:
2x² + 5x + 9 = 0
Calculate the discriminant of quadratic equation ax² + bx + c = 0:
Δ = b² - 4ac
if Δ < 0, then an equation has no solution
if Δ = 0, then an equation has one solution
if Δ > 0, then an equation has two solution.
2x² + 5x + 9 = 0
a = 2, b = 5, c = 9
Δ = 5² - 4(2)(9) = 25 - 72 = -47 < 0 - no solution
There are zero x- intercepts of given function.
X- Intercepts:
To find x- intercepts, substitute [tex]y=0[/tex] in the function.
Given function is, [tex]y=2x^{2} +5x+9[/tex]
Substitute [tex]y=0[/tex] in above equation.
[tex]2x^{2} +5x+9=0\\\\[/tex]
The graph of function where crosses the x- axis that point is known as x- intercepts of function.
Graph of given function attached below, It is observed that graph will not crosses the x axis at any point.
Thus, There are zero x- intercepts of given function.
Learn more about the intercepts of function here:
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