When a polynomial is written as a product of unfactorable polynomials with integer coefficients. Select one of the following option.

A. Factored Completely

B. Perfect Squares Trinomial Pattern

C. Factoring by Grouping

D. Difference of Two Squares Pattern

E. Factor out the GCF

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2