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The row 2 in the matrix must be multiplied by 0.5

Matrix Multiplication

According to the question;

  • The row 2 contains elements; 2 0 -2

Hence, let the required number to multiply row 2 be; x so that;

  • 2 × X = 1

  • 0 × X = 0

  • -2 × x = -1

From all the equations above; it follows that;

  • x = 1/2 = -1/-2

Hence, the required number is; 1/2 = 0.5

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