(4x2-2x3)
(8-6)
xz=2
Hope this helps!
The y-intercept is (0, -8)
if you set the equation to slope intercept format you get
y=-2x-8
"Classify the polynomial by the number of terms" means a term contains both the variables and its coefficient. For example a "monomial" has one term like
.
A binomial has 2 terms like 
A trinomial has 3 terms like 
And a polynomial has 4 or more terms.
So basically one can classify the type of polynomial by counting the number of terms in a given equation.