I need help I just don't understand

See below.

Step-by-step explanation:

First, move all the terms to one side so we have only a zero on the right:

(I divided everything by negative 1 in the third step. This is optional, but I like having the first term positive.)

Now, we just need to factor it. To factor, what you want to do is find two numbers a and b such that:

When a and b is multiplied together, they equal the first coefficient and constant multiplied together.

And when a and b is added together, they equal the second term.

In other words, we want to find two numbers that when multiplied equals 14(-45)=-630 and when added equals 17. Then, we can substitute this into the 17. You do this by guessing and checking. It's useful to have a calculator.

After a bit, you can find that 35 and -18 works. Thus:

Now, the finish the problem, we just need to use the Zero Product Property and solve for x:

Note: This only works for quadratics.

ryan had a head start of 10 meters.

-1/2 +2

step-by-step explanation: