You dont have 2 do the second one but if you would it would be apreciated

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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.

3x = 729 solve for x plz . it's urgent. will mark