Potential rational roots of f(x) = x4 – 2x3 + 5x2 – 7x + 9

To quickly solve this problem, we can use a graphing tool or a calculator to plot the equation.

Please see the attached images below, to find more information about the graph

The equation is:

f(x) = x^4 – 2x^3 + 5x^2 – 7x + 9

The equation has only complex roots.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

lol 2

step-by-step explanation: