Information is given about a polynomial f(x) whose coefficients are real numbers. Find the
remaining zeros of f.
Degree 4; zeros: i, 1 + i.
0 -1 +i, 1- i
B -i, -1 + i
C 1-i
D -i, 1-i

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.