U2 All Matrix Operations & Factoring by Grouping Quiz *

What is a Matrix?

• An equation of over 5 numbers or symbols 
• A set of numbers in rows and columns
• A method of finding the n^th value of a series
• A complicated number system

How many rows are in a 3 x 7 matrix?

• 7

• 3

• 21

• 10

Find A + B.

• 12     25
  7     0

• 8     10
  8     1

• -4       0
  6     -1
• not possible because rows do not match columns

Tags

CCSS.HSN.VM.C.8

Find A - B.

• 4     10
  -6      -1 

• 8     10
  8     1

• -4     0
  6     -1

• can't add two together because the rows dont match columns

Tags

CCSS.HSN.VM.C.8

Complete the matrix operation shown. Show all work for credit.

Multiply the following matrices, if possible. Show all work for credit.

Tags

CCSS.HSN.VM.C.8

Find A*B, if possible. Show all work for credit.

• 47     30
  9     5
• 17     15
  42     35
• 10     25
  7     1
• not possible because rows do not match columns

Tags

CCSS.HSN.VM.C.8

For the following word problem below, setup the corresponding matrices in order to solve the problem. Show all work. Be as detailed as possible and answer in a sentence.

• A $1453

• B $783

• C $1715

• D $1285

Tags

CCSS.HSA.APR.A.1

Factor the Polynomial expression by grouping. Show all necessary steps for credit.

12x³ + 2x² - 30x - 5

• (2x² - 5) (6x + 1)

• (2x² + 5) (6x - 1)

• (6x² - 5) (2x + 1)

• (6x² + 5) (2x - 1)