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  • Please Solve RD Sharma Class 12 Chapter Algebra of Matrices Exercise 4.2 Question 1 Subquestion (ii) Maths Textbook Solution.

Please Solve RD Sharma Class 12 Chapter Algebra of Matrices Exercise 4.2 Question 1 Subquestion (ii) Maths Textbook Solution.

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Answer: \begin{bmatrix} 3 & -1 & 6\\ 2& 9& 6\\ -1 & -1 &6 \end{bmatrix}
Hint: Add the two matrices simply.
Given: \begin{bmatrix} 2 & 1& 3\\ 0& 3& 5\\ -1 & 2 &5 \end{bmatrix}+\begin{bmatrix} 1 &-2 &3 \\ 2 &6 &1 \\ 0 &-3 &1 \end{bmatrix}  
Solution:

\begin{bmatrix} 2 & 1& 3\\ 0& 3& 5\\ -1 & 2 &5 \end{bmatrix}+\begin{bmatrix} 1 &-2 &3 \\ 2 &6 &1 \\ 0 &-3 &1 \end{bmatrix}    = \begin{bmatrix} 2+1 & 1-2& 3+3\\ 0+2& 3+6& 5+1\\ -1+0 & 2-3 &5+1 \end{bmatrix}

                                                      = \begin{bmatrix} 3 & -1 & 6\\ 2& 9& 6\\ -1 & -1 &6 \end{bmatrix}

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