In algerbra we use an blank to represent a varible

On a piece of paper graph f(x)=5•(0.4)^x

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

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i