Add/Subtract/Multiply Matrices Review

Add

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

Tags

CCSS.HSN.VM.C.8

Multiply

• 25
  25
  5
• -25
  25
  -5
• -10
  -10
  -6
• 10
  10
  6

Tags

CCSS.HSN.VM.C.8

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.

Tags

CCSS.HSN.VM.C.8

Multiply

• 1   2
  6   -8
• -3   -5
  -5   -11
• -2     8
  -6   -12
• 2  -3
  5   -2

Tags

CCSS.HSN.VM.C.8

Dimensions?

• a
• b
• c
• d

Find A−B

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

Tags

CCSS.HSN.VM.C.8

Multiply

• 20     15    -10
  30     -5         0
• -20      15     -10
  30     -5          0
• 1        8       3
  11     4        5
• 20     -15     10
  -30         5        0  

Tags

CCSS.HSN.VM.C.8

Perform the indicated operation.  If it’s not possible, select Not Possible. 

• 1   3
  9   16
• 1   3
  9   -16
• -1    3
  9   -16
• Not Possible

Tags

CCSS.HSN.VM.C.8

Add

• [11 8]

  [ 4 -2]

• [ 3 2 ]

  [-6 -6]

• [-3 2 ]

  [-4 -6]

• [11 8]

  [-4 2 ]

Tags

CCSS.HSN.VM.C.8

Subtract

• [3 -8]

  [0 -1 ]

• [3 -4 ]

  [8 -13]

• [-3 8]

  [0 1]

• [3 -8]

  [-8 1]

Tags

CCSS.HSN.VM.C.8