Register to reply 
Determinant systems 
Share this thread: 
#1
Dec2612, 09:44 AM

P: 3

am not a math guru :P,am a newbie even if this should be solved by a newbie as well, Id like u guys to help me out to solve this one :
3xy+2z=4 Im really needing this, thank you all. 


#2
Dec2612, 10:04 AM

Emeritus
Sci Advisor
HW Helper
Thanks
PF Gold
P: 6,534

One equation, three unknowns.
You can solve this equation as long as you pick values for any two of the unknowns. 


#3
Dec2612, 10:16 AM

P: 3

3x+y+2z=4 2x+3yz=4 2xyz=0 


#4
Dec2612, 10:45 AM

HW Helper
P: 6,202

Determinant systems
You could either convert it into a matrix equation and solve it.
Or you can use one equation to modify the other two, and then solve those two simultaneously. For example if you take the last equation and substitute it into the first 2, then solve the now modified first two you will get two of the solutions. 


#5
Dec2612, 10:54 AM

P: 3

Thank you guys. But when its up to math in english im not good,actually im not understanding this that much, i need someone to solve it in mathematical view..



#6
Dec2612, 11:36 AM

HW Helper
P: 6,202

3x+y+2z=4 (1) 2x+3yz=4 (2) 2xyz=0 (3) If you take equation 2 and subtract that from equation 3, what equation are you left with? Similarly, if you take equation 1 and add that to 2*equation 3, what equation are you left with? 


Register to reply 
Related Discussions  
Interested in Chaos Theory, Complex Systems, Nonlinear Systems  Academic Guidance  8  
Finding determinant given determinant of another matrix  Calculus & Beyond Homework  3  
Solving a determinant using another determinant  Precalculus Mathematics Homework  1  
Tracedeterminant plane: underdamped systems  Calculus & Beyond Homework  0  
MultiStep linear systems problem  Build ODE, impulse response, systems balance  Calculus & Beyond Homework  12 