Multiplying Matrices

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AFTER multiplying by the scalar, what will this element be?

a₃₂

• undefined

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• Row 1 : 18, -12, -6
  Row 2 : -42, -48, 30
  Row 3 : -24, -36, 54
• Row 1 : 6, 18, 12
  Row 2 : 30, 42, 48
  Row 3 : 54, 36, 24
• Row 1 : 18, 12, 6
  Row 2 : 42, 48, 30
  Row 3 : 24, 36, 54
• Row 1 : -18, 12, 6
  Row 2 : 42, 48, -30
  Row 3 : 24, 36, -54

Find -3A

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• Does Not Exist

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Bonus Point! 3A=?

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Perform the indicated matrix operation.

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• Not possible.

If N = [[-3, 3], [-2, 2]] and t = -1, what is the result of tN?

• [[3, -3], [2, -2]]

• [[-3, 3], [-2, 2]]

• [[1, -1], [1, -1]]

• [[0, 0], [0, 0]]

How do you multiply a scalar into a matrix?

• Multiply all of the entries by the scalar

• Replace every entry with the scalar

• Add the square of it to all of the entries

• Multiply the first row by the scalar