Factor the Polynomial Completely $4 x + 4 y + a x + a y$

question 215

Short Answer

Factor the polynomial completely. Indicate if it is not factorable using integers. $4 x + 4 y + a x + a y$

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Definitions:

Antigen-Presenting Cell

A cell that displays antigen complexed with major histocompatibility complexes on their surfaces for recognition by T-cells.

T-Cell Receptor

A molecule found on the surface of T cells that is responsible for recognizing fragments of antigens as peptides bound to major histocompatibility complex (MHC) molecules.

CD8 Glycoprotein

A surface protein found on certain immune cells, such as cytotoxic T cells, involved in the immune response.

CD4 Glycoprotein

A protein on the surface of immune cells, such as T helper cells, that is involved in initiating the immune response.