To learn how to get started, try studying some online lessons onsolving radical equationsandfactoring quadratics.

Once you've learned the basic terms and techniques, you can attempt the exercises. For the first one, a good start would be to subtract the x to the right-hand side, and then square both sides, keeping in mind that (8 - x)^2 means (8 - x)(8 - x).

For the second one, I'm not sure if they want you to square first, and then solve by factoring, or else rearrange as follows:

. . . . .

...and then solving by factoring this quadratic-type equation. Check your book and your class notes for advice on this.

If you get stuck, please reply showing all of your work and reasoning so far. Thank you!