What are the solutions of the equation x4 + 3x2 + 2 = 0? use u substitution to solve. mc018-1.jpg and x = ±1 mc018-2.jpg and x = ±i mc018-3.jpg and x = ±i mc018-4.jpg and x = ±1

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