Intro Matrices

What would two matrices need to be considered 'equal'?

• The same dimensions and different element values
• The same dimension and the same element values
• Two matrices can never be equal
• two matrices are 'equal' when they are added together to create a matrix of only "0's"

Dimensions?

• a
• b
• c
• d

Tags

CCSS.HSN.VM.C.6

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

Tags

CCSS.HSN.VM.C.8

CCSS.HSN.VM.C.6

Factor:            10x² + 15x

• 5x(2x + 3)
• -5x(2x + 3)
• 5x(2x - 3)
• 5(2x + 3)

Add

• 11    8
  -4     2
• 3     2
  -6    -6
• -3    2
  -4    -6
• 10    8
  -6    2

Tags

CCSS.HSN.VM.C.8

Subtract

• -5
  -8
  3
  10
• -9
  8
  3
  2
• 5
  -8
  3
  10
• -5
  8
  3
  2

Tags

CCSS.HSN.VM.C.8

Find B-A

• -3     1
  7     -1
• 1     0
  1     -4
• -4       0
  6     -1
• not possible because rows do not match columns

How many columns are in a 5 x 4 matrix?

• 5
• 4
• 20
• 9

In Matrix R (pictured) what is the value of element R_3,2

• 8
• 9.01
• 6
• 1

What must be true in order to ADD two matrices?

• They must be square.
• The dimensions must be equal.
• The determinant can't equal 0.
• The column of the 1st must equal the row of the 2nd.