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  • Please Solve RD Sharma Class 12 Chapter Algebra of Matrices Exercise 4.2 Question 11 Maths Textbook Solution.

Please Solve RD Sharma Class 12 Chapter Algebra of Matrices Exercise 4.2 Question 11 Maths Textbook Solution.

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Answer:A = \begin{bmatrix} 8 & -3& 5\\ -2 & -3 & -6 \end{bmatrix}

Hint: Transposing the matrix from LHS to RHS

Given: \begin{bmatrix} 1 & 2 &-1 \\ 0 & 4 & 9 \end{bmatrix} + A =\begin{bmatrix} 9 &-1 &4 \\ -2& 1 &3 \end{bmatrix}

Here, we have to compute A.

Solution:

\begin{bmatrix} 1 & 2 &-1 \\ 0 & 4 & 9 \end{bmatrix} + A =\begin{bmatrix} 9 &-1 &4 \\ -2& 1 &3 \end{bmatrix} 

A =\begin{bmatrix} 9 &-1 &4 \\ -2& 1 &3 \end{bmatrix}-\begin{bmatrix} 1 & 2 &-1 \\ 0 & 4 & 9 \end{bmatrix}

A =\begin{bmatrix} 9-1 &-1-2 &4 +1\\ -2-0& 1-4 &3 -9 \end{bmatrix}

A = \begin{bmatrix} 8 & -3& 5\\ -2 & -3 & -6 \end{bmatrix}                                                                                                                                                                                                                                                                                    

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