100 points! find the zeros of each quadratic function from its graph. enter multiple zeros separated with a comma. for example 4, 5

disclaimer: if the answer is wrong it will be reported

Step-by-step explanation:

The zeros of a quadratic function are x-intercepts of parabola.

Graph #1:

x = -6 and x = -1

Graph #2:

not exist

Graph #3:

x = 5

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.