Factor Completely $b ^ { 2 } - 18 b + 81$

question 46

Multiple Choice

Factor completely. Check by multiplying the factors. $b ^ { 2 } - 18 b + 81$

• A) \(( b - 9 ) ( b - 9 )\)
• B) \(( b - 81 ) ( b - 1 )\)
• C) \(( b + 9 ) ( b - 9 )\)
• D) \(( b + 81 ) ( b + 1 )\)
• E) \(( b + 9 ) ( b + 9 )\)

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Definitions:

Free Ends

The extremities or terminals of a linear structure, such as a piece of DNA or a thread, that are not attached or bonded to anything else.

Hydrophobic

Characteristic of molecules that repel water; substances that are not easily soluble in water.

Hydrophilic

A term describing molecules or substances that have an affinity for water, making them capable of dissolving in or being wetted by water.

Fatty Acid

A lipid that is an organic acid containing a long hydrocarbon chain, with no double bonds (saturated fatty acid), one double bond (monounsaturated fatty acid), or two or more double bonds (polyunsaturated fatty acid); components of triacylglycerols and phospholipids, as well as monoacylglycerols and diacylglycerols.