Pull an x from the first two terms
x(x^3 + y^3) + (x^3 + y^3) Now x^3 + y^3 is a common factor.
(x^3 + y^3)*(x + 1) That should be far enough. It can be factored further by factoring (x^3 + y^3) but there is no point because you can't do anything after that. But in case you want to know how x^3 + y^3 factors
(x^3 + y^3) = (x + y)(x^2 - xy + y^2)
Which means you could write original polynomial as
(x + y)(x^2 - xy + y^2)(x + 1)
Part B
You factored the x out of xy^3 so that you would have a common factor (x^3 + y^3) to pull out as a common factor for the whole polynomial.

Let's simplify ~






value x lies between :

if the value of x is taken -5


if value of x is taken as 5


So, the possible values of the required expression lies between ~

I hope you understood the whole procedure. let me know if you have any doubts in given steps ~
This could be a parallelogram, but it also could easily be an isosceles trapezoid. A trapezoid is a figure with only one pair of parallel sides. An isosceles trapezoid is a trapezoid where the non-parallel sides are the same length. It's similar to an isosceles triangle.
Because this could be an isosceles trapezoid, this means we don't have enough information. See the attached image below for an example.