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Matrix algebra - matrix equation

by Bitter
Tags: algebra, equation, matrix
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Bitter
#1
Oct8-06, 10:18 AM
P: 103
A=(5, 4) I (1, 0)
(4,6) (0,1)

Those are matrix by the way.

How do I show A^2=11A-18I? I know i'm overlooking something, but i don't know what. Any tips would be helpful
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Bitter
#2
Oct8-06, 10:43 AM
P: 103
ah im sorry, I meant to put this in the question section, please move!
radou
#3
Oct8-06, 10:43 AM
HW Helper
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P: 3,220
Do you know how to multiply matrices? You may want to look at this link: http://www.purplemath.com/modules/mtrxmult.htm.

matt grime
#4
Oct8-06, 02:00 PM
Sci Advisor
HW Helper
P: 9,396
Matrix algebra - matrix equation

Let me ask you this.

Let x=3. How do you show that x^2=2x+3?


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