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# 4.2 - the opposites of the corresponding elements of A-= 8...

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1 4.2 Notes Adding and Subtracting Matrices Warm up / Focus box4 Simplify 4 3 11 121 2 + ÷ ( ) [ ] 2 4 2 5 6 + - Our Goals For Today box4 Add and subtract matrices box4 Solve matrix equations Sometimes you may need to add or subtract matrices to get new info. You can perform matrix addition on matrices with equal dimensions by adding corresponding elements … Find the sum - - - + - - - 5 1 4 2 1 3 10 1 5 3 24 12 Identity and Inverse Matrices box4 The identity matrix for all m X n matrices is the zero matrix , O , whose elements are all zeros. box4 The opposite, or additive inverse, of an m X n matrix A is – A. square6 A is the m X
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Unformatted text preview: the opposites of the corresponding elements of A ---= 8 3 4 . 3 2 . 1 4 1 7 6 2 A =-A Solve b A Matrix equation is an equation in which the variable represents a matrix. b Solve -= -+ 4 4 7 10 5 2 1 X Solve for x & y b The corresponding elements of equal matrices are equal --= --+ 10 4 3 5 28 2 5 8 y y x Homework # ____ b P174 (2, 8, 10-22 even)...
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