Given $3 + i$ Is a Root, Determine All Other Roots Of

question 18

Multiple Choice

Given $3 + i$ is a root, determine all other roots of $f ( x ) = x ^ { 4 } - 10 x ^ { 3 } + 42 x ^ { 2 } - 88 x + 80$ .

• A) \(x = 3 + i , 2 \pm 2 i , 2 - i\)
• B) \(x = 3 - i , 2 \pm i\)
• C) \(x = 3 - i , 2 - 2 i , 2 + i\)
• D) \(x = 3 - i , - 2 \pm 2 i\)
• E) \(x = 3 - i , 2 \pm 2 i\)

---

Definitions:

Weighted-Average Method

An inventory costing method that assigns an average cost to each unit of inventory, calculating it based on the weighted average of the cost of goods available for sale.

Ending Inventory

The cumulative worth of merchandise available for purchase at the conclusion of a financial period.

FIFO Method

"First-In, First-Out", an inventory valuation method where goods first added to inventory are the first ones considered sold.

Ending Inventory

The total value of goods available for sale at the end of an accounting period.