1: Add or Subtract: (-2x^2 - 4x + 8) + (5x^2 + 2x - 25)
2: Add or Subtract: (5x^2 + 4x - 6) - (-5x^2 - 3x + 15)
3: Multiply: (3x - 1)(4x^2 + 3x + 7)
4: Find the roots: f(n) = n^2 - 2n - 15

Show your work please and thank you! Need answers ASAP

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.