Math Problem Statement

Solve the matrix equation X - A = B for X where A = [[-3, -7], [2, -9], [5, 0]] and B = [[-5, -1], [0, 0], [3, -4]].

Solution

To solve the matrix equation XA=BX - A = B for XX, we need to isolate XX. We can do this by adding matrix AA to both sides of the equation:

X=A+BX = A + B

Now, let's calculate A+BA + B.

Matrices:

A=[372950],B=[510034]A = \begin{bmatrix} -3 & -7 \\ 2 & -9 \\ 5 & 0 \end{bmatrix}, \quad B = \begin{bmatrix} -5 & -1 \\ 0 & 0 \\ 3 & -4 \end{bmatrix}

Matrix Addition A+BA + B:

X=[3+(5)7+(1)2+09+05+30+(4)]X = \begin{bmatrix} -3 + (-5) & -7 + (-1) \\ 2 + 0 & -9 + 0 \\ 5 + 3 & 0 + (-4) \end{bmatrix}

Let's calculate each element:

  1. First row: (3)+(5)=8(-3) + (-5) = -8, and (7)+(1)=8(-7) + (-1) = -8.
  2. Second row: 2+0=22 + 0 = 2, and (9)+0=9(-9) + 0 = -9.
  3. Third row: 5+3=85 + 3 = 8, and 0+(4)=40 + (-4) = -4.

Therefore, the matrix XX is:

X=[882984]X = \begin{bmatrix} -8 & -8 \\ 2 & -9 \\ 8 & -4 \end{bmatrix}


Would you like further details on this solution, or do you have additional questions?

Related Questions:

  1. How do you add matrices with different dimensions?
  2. What is matrix subtraction, and how does it differ from matrix addition?
  3. How can we check if a matrix addition is performed correctly?
  4. What are the properties of matrix addition?
  5. Can matrix addition be commutative and associative?

Tip:

When adding or subtracting matrices, make sure the matrices have the same dimensions; otherwise, the operation is undefined.

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Math Problem Analysis

Mathematical Concepts

Linear Algebra
Matrix Operations
Matrix Addition

Formulas

X = A + B

Theorems

Properties of Matrix Addition

Suitable Grade Level

Grades 10-12 (High School)