I NEED HELP PLEASE! THANKS :)

A

Step-by-step explanation:

First, let's do the difference of two squares:

Note that (Pythagorean Identity)

Thus, we can substitute:

Now, and I'm serious, you just have to use your creativity. After a while, you will find that:

So:

Thus, we have

Now, we can substitute:

x=30

step-by-step explanation:

there is no question content here, but you for the free points! : d