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For What Values of X and Y Are the Following Matrices Equal? `A=[[2x+1 2y],[0 Y^2 - 5y]]``B=[[X + 3 Y^2 +2],[0 -6]]`

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Question

For what values of x and y are the following matrices equal?

`A=[[2x+1   2y],[0              y^2 - 5y]]``B=[[x + 3      y^2 +2],[0        -6]]`

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Solution

As the given matrices A and B are equal, therefore, their corresponding elements must be equal. Comparing the corresponding elements, we get

2x + 1 = x + 3                                  2y = y2 + 2

        0 = 0                                  y2 − 5y = −6

On simplifying, we get

x = 2, but there is no common value of y for which A and B are equal.

Hence, A and B cannot be equal for any value of y.

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Chapter 4: Algebra of Matrices - Exercise 5.1 [Page 8]

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R.D. Sharma Mathematics Volume 1 and 2 [English] Class 12
Chapter 4 Algebra of Matrices
Exercise 5.1 | Q 19 | Page 8

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