Matrix (HELP PLEASE)
| 1. | (10 A + 9 B)(10 A - 9 B) = 100 A2 - 81 B2 | False True False |
| 2. | (-10 + A)(10 + A) = -100 + A2 | False True False |
| 3. | A2 = 0 ⇒ A = 0 | True True False |
| 4. | 10 AT + A is symmetric | False True False |
how do i do these questions? i seriously dont get it someone please help me
Read these properties of matrix operations
http://www.sosmath.com/matrix/matrix2/matrix2.html
http://www.sosmath.com/matrix/matrix2/matrix2.html
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