If this is what you mean then the degree of the polynomial would be 3 since 3 is the highest exponent of all the terms.
You can use SAS, or Side Angle Side. Because BC equals EC and AC equals DC, you can get two sides. Also, angle BCA and DCE have the same angle measurement, so you can conclude, using SAS, that BA equals to ED. Also, you can also prove that these two triangles are congruent and that all of the angles are the same as well because all of the side lengths are equal.
Y=x-5
6=x-5
6+5=x-5+5
11=x
x=11
W=0.9
So w = 0.9 and v = -4
The solution is where the red and blue lines cross each other.
They cross at X = -5.1 and X = 2.1