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Given matrices M and N, calculate 2M - 3N.

Mathematics

ScanSolve AI Answer

Step-by-step solution

5 steps
  1. Identify the given matrices MM and NN.

    M=(13245−1−320)M = \begin{pmatrix} 1 & 3 & 2 \\ 4 & 5 & -1 \\ -3 & 2 & 0 \end{pmatrix} N=(1−234−152−3−1)N = \begin{pmatrix} 1 & -2 & 3 \\ 4 & -1 & 5 \\ 2 & -3 & -1 \end{pmatrix}
  2. Calculate $2M$.

    Multiply each element of matrix MM by 2:

    2M=2(13245−1−320)=(2×12×32×22×42×52×(−1)2×(−3)2×22×0)2M = 2 \begin{pmatrix} 1 & 3 & 2 \\ 4 & 5 & -1 \\ -3 & 2 & 0 \end{pmatrix} = \begin{pmatrix} 2 \times 1 & 2 \times 3 & 2 \times 2 \\ 2 \times 4 & 2 \times 5 & 2 \times (-1) \\ 2 \times (-3) & 2 \times 2 & 2 \times 0 \end{pmatrix} 2M=(264810−2−640)2M = \begin{pmatrix} 2 & 6 & 4 \\ 8 & 10 & -2 \\ -6 & 4 & 0 \end{pmatrix}
  3. Calculate $3N$.

    Multiply each element of matrix NN by 3:

    3N=3(1−234−152−3−1)=(3×13×(−2)3×33×43×(−1)3×53×23×(−3)3×(−1))3N = 3 \begin{pmatrix} 1 & -2 & 3 \\ 4 & -1 & 5 \\ 2 & -3 & -1 \end{pmatrix} = \begin{pmatrix} 3 \times 1 & 3 \times (-2) & 3 \times 3 \\ 3 \times 4 & 3 \times (-1) & 3 \times 5 \\ 3 \times 2 & 3 \times (-3) & 3 \times (-1) \end{pmatrix} 3N=(3−6912−3156−9−3)3N = \begin{pmatrix} 3 & -6 & 9 \\ 12 & -3 & 15 \\ 6 & -9 & -3 \end{pmatrix}
  4. Evaluate 2M−3N2M - 3N.

    Subtract the corresponding elements of 3N3N from 2M2M:

    2M−3N=(264810−2−640)−(3−6912−3156−9−3)2M - 3N = \begin{pmatrix} 2 & 6 & 4 \\ 8 & 10 & -2 \\ -6 & 4 & 0 \end{pmatrix} - \begin{pmatrix} 3 & -6 & 9 \\ 12 & -3 & 15 \\ 6 & -9 & -3 \end{pmatrix} 2M−3N=(2−36−(−6)4−98−1210−(−3)−2−15−6−64−(−9)0−(−3))2M - 3N = \begin{pmatrix} 2 - 3 & 6 - (-6) & 4 - 9 \\ 8 - 12 & 10 - (-3) & -2 - 15 \\ -6 - 6 & 4 - (-9) & 0 - (-3) \end{pmatrix} 2M−3N=(−16+6−5−410+3−17−124+90+3)2M - 3N = \begin{pmatrix} -1 & 6 + 6 & -5 \\ -4 & 10 + 3 & -17 \\ -12 & 4 + 9 & 0 + 3 \end{pmatrix} 2M−3N=(−112−5−413−17−12133)2M - 3N = \begin{pmatrix} -1 & 12 & -5 \\ -4 & 13 & -17 \\ -12 & 13 & 3 \end{pmatrix}
  5. Compare the result with the given options.

    The calculated matrix matches option D.

    The final answer is (−112−5−413−17−12133)\boxed{\begin{pmatrix} -1 & 12 & -5 \\ -4 & 13 & -17 \\ -12 & 13 & 3 \end{pmatrix}}.

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