- Thread starter
- #1

#### karush

##### Well-known member

- Jan 31, 2012

- 2,655

- Thread starter karush
- Start date

- Thread starter
- #1

- Jan 31, 2012

- 2,655

- Thread starter
- #2

- Jan 31, 2012

- 2,655

2&-3\\

3&2\\

8&-5\\

-2&1

\end{array}\right]

\left[\begin{array}{rrr}

-3\\5

\end{array}\right]

=\left[\begin{array}{rrrrr}

-21\\1\\-49\\11

\end{array}\right]$$

do they want $x_1[ ]+x_2[ ]+x_3[ ]+x_4[ ]$

cant seen to find example for this

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- #3

- Jan 31, 2012

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2\cdot (-3)&+(-3)\cdot 5\\

3\cdot (-3)&+2\cdot 5\\

8\cdot (-3)&+(-5)\cdot 5\\

-2\cdot (-3)&+1\cdot 5

\end{array}\right ]

=\left[\begin{array}{rl}

-6&-15\\

-9&+10\\

-24&+25\\

6&+5

\end{array}\right]$$

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- #4

- Jan 31, 2012

- 2,655

$$-3\left[\begin{array}{r}

2\\3\\8\\-2

\end{array}\right]

+5\left[\begin{array}{r}

-3\\2\\-5\\1

\end{array}\right]

=\left[\begin{array}{rrrrr}

-21\\1\\-49\\11

\end{array}\right]

$$

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- #5

- Jan 31, 2012

- 2,655