Question

i need help !!

Answer 1

One question at a time

For the first big question regarding the graph

how would you find out the equation for it?

it has zeros at 0 and 4 so (0, 0) and (4, 0)

and it goes through the point (2, 20)

which equation that's listed satisfies those three points?

Answer 2

A few of these other questions are similar too

so you need to factor the equations or you can just graph it using https://www.desmos.com/calculator

the x-values where the graph intersects the x-axis (so when y=0) is going to be the zeros of the equation