Which polynomial is prime?
x4 + 3x2 – x2 – 3
x4 – 3x2 – x2 + 3
3x2 + x – 6x – 2
3x2 + x – 6x + 3

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte