math homework help?

0 ⤊

use the definition of determinant to solve the problem:

|x 1 2|
|x 0 4|
|x 3 2|

= (equal to)

|x -7|
|2 3|

^^^ those things on the outside of the numbers are suposed to be like an absolute value//matrix kinda thing. ik how to do this type of problem but i just cant get it to work. help w/ explanation thanks

2006-09-27 11:22:01 · 2 answers · asked by genius 1 in Education & Reference ➔ Homework Help

2 answers

x (0-12) - 1(2x-4x) +2(3x) = 3x+14

-12x+2x+6x = 3x+14

-4x = 3x+14
-7x = 14

x = -2

2006-09-27 11:34:25 · answer #1 · answered by z_o_r_r_o 6 · 0⤊ 0⤋

i dont think you wrote it out right

2006-09-27 11:32:06 · answer #2 · answered by killerlegend2u 3 · 0⤊ 0⤋