Jacob incorrectly factored 20x2 – 44x + 8 using the following steps,
Step 1: 2022 – (40x + 4x) + 8
Step 2: (20x2 – 40x) + (4x – 8)
Step 3: 20x (x - 2) + 4(x - 2)
Step 4: (20x + 4) (x - 2)
In which step did he first make an error?

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.