How do the real zeroes relate to the x-intercepts of the quadratic function?​

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?

Which shows one way to determine the facts of x3+4x2+5x+20 by grouping