Hi! Does anyone know how in the world to do this matrix problem?
Find all values of x that make:
|2 -1 4|.............|x 4|
|3 0 5| = .........|5 x|
|4 1 6|
Thanks alot. Please tell me how you got your answer. (...'s are for spacing)
Find all values of x that make:
|2 -1 4|.............|x 4|
|3 0 5| = .........|5 x|
|4 1 6|
Thanks alot. Please tell me how you got your answer. (...'s are for spacing)
-
Is this asking about the determinant?
The determinant of the thing on the right is x*x - 4*5 = x^2 - 20
The determinant of the thing on the left is, well, you should know the method for figuring that out. Here's the method:
http://www.purplemath.com/modules/determ…
Set that number equal to x^2 - 20, and then solve for x.
The determinant of the thing on the right is x*x - 4*5 = x^2 - 20
The determinant of the thing on the left is, well, you should know the method for figuring that out. Here's the method:
http://www.purplemath.com/modules/determ…
Set that number equal to x^2 - 20, and then solve for x.