Friday

July 25, 2014

July 25, 2014

Posted by **mdan** on Tuesday, October 15, 2013 at 11:54am.

x1 + 2x2 - x3 = -3

-2x1 - x2 + 3x3 = 0

-4x1 + 4x2 - x3 = -12

A. x1 = 2, x2 = -3, x3 = 1

B. x1 = 1, x2 = -2, x3 = 1

C. x1 = 1, x2 = -2, x3 = 0

D. x1 = 1, x2 = -3, x3 = 1

- maths -
**mdan**, Tuesday, October 15, 2013 at 11:54amthis one seems difficult...plz help

- maths -
**Steve**, Tuesday, October 15, 2013 at 12:10pmYou have an equation AX=B

where

A =

(1 2 -3)

(-2 -1 3)

(-4 4 -1)

and

B =

(-3)

(0)

(-12)

A^{-1}= 1/3 times

(11 10 -3)

(14 13 -3)

(12 12 -3)

So, X = A^{-1}B = (1,-2,0)

- maths -
**mdan**, Tuesday, October 15, 2013 at 12:32pmfabulous

**Related Questions**

Algebra 2(check pt 4) - 1)Cramer's Rule is used to solve the system of equations...

Algebra help! - 1.) Solve the system by triangularizing the augmented matrix and...

Algebra help! - Please help and I would appreciate an explanation as to how you ...

Augmented Matrix - Perform row operations on the augmented matrix as far as ...

math - Solve following system of equations? x+3z=-2 2x+2y+z=4 3x+y-2z=5 i need ...

MATHS - a parabola passes through the points (1,1) , (2,0) and (3,1) the ...

Algebra II - 1. solve this system using matrices: 3.7x-2.3+4.2z=8 2.6+4.6y-3.9z=...

Algebra II (Matrices) - My book doesn't solve it like a linear equation, they ...

Maths: Algebra Matrices Class 12th - matrix{{0, 1, -1}, {2, 1, 3}, {1, 1, 1}} ...

Discrete Math - I am really stuck on these problems. I've worked a lot of them ...