Factor Completely the Polynomial

question 15

Multiple Choice

Factor completely the polynomial. Indicate any that are not factorable using integers. a ² - 4 a + 21

• A)( a - 3)( a + 7)
• B)( a + 3)( a - 7)
• C)( a - 3)( a - 7)
• D)( a + 3)( a + 7)
• E)not factorable

---

Definitions:

Protein

Large, complex molecules that play critical roles in the body, including in the structure, function, and regulation of tissues and organs.

Genome

The complete set of genes or genetic material present in a cell or organism.

Chromosome Set

A complete set of chromosomes from a cell that contains all genetic information necessary for an organism of a certain species.

C. Elegans

A species of nematode worm, Caenorhabditis elegans, widely used as a model organism in genetics and developmental biology.