Question: matrix , mathematics 3. (a) Solve the following system: 2x + y - 2z = 10 CO4 3x + 2y + 2z = 1 5x

matrix , mathematics

3. (a) Solve the following system: 2x + y - 2z = 10 CO4 3x + 2y + 2z = 1 5x + 4y + 3z = 4 1 0 1\\ (b) IfA= 0 1 -1 -1 0 , then show that A3 - A2 - A + 21 = 0, where CO4 I. 0 are the unit matrix and the null matrix of size 3 x 3 respectively. Ise this result to find A- 1
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