Please use the ^ sign for powers. As you have it written, the first one means
w times 2.
But anyway, for the first one. Notice the difference of two squares?.
. Now, can you factor using the proper form?. (x+y)(x-y).
Take the square root of both sides.
For the other one, you can factor it.
And from there, it's easy to solve.
Yeah. Thanks. =) My mistake.