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Explain Solution RD Sharma Class 12 Chapter Algebra of Matrices Exercise 4.5 Question 10 Maths.

Answers (1)

Answer: 5

Hint:A is symmetric matrix A = A^{T}

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

Solution:

A^{T}=\begin{bmatrix} 4 & 2x-3\\ x+2& x+1 \end{bmatrix}

A = A^{T}

\begin{bmatrix} 4 & x+2\\ 2x-3 & x+1 \end{bmatrix}= \begin{bmatrix} 4 & 2x-3\\ x+2& x+1 \end{bmatrix}

2x - 3 = x + 2

x = 5

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