What are benefits of having a quadratic in standard form

Which of the following is the result of expanding the series

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.

Which term below correctly completes the following sentence? if a function has a vertical asymptote at a certain x value, then the function is what at that value