untitled

• (0, 0, -3)

• Infinitely Many Solutions

• No Solution

• (0, 0, 0)

• (-1, -4, -4)

• (1, 4, 4)

• (-1, 4, 4)

• (1, -4, -4)

Use RREF to solve the matrix from the previous problem

Use parenthesis around the triple, commas between numbers, and alphabetical order (_,_,_)

• A
• B
• C
• D

Find 2A-3B

• -3 1

  7 -1

• 1 0

  1 -4

• -4 0

  6 -1

• -14 -5

  11 -3

Find A-B

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

Subtract

• 3    -8
  0   -1
• 3   -4
  8  -13
• -3   8
  0    1
• 3   -8
  -8    1

Can the operation be performed?

• Yes
• No
• Sometimes
• only Mrs. Jordan knows