Solving Simultaneous Equations with 2xy: Tips and Methods

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Homework Help Overview

The discussion revolves around solving simultaneous equations involving a term with 2xy. The equations presented are x = 3x² + 2xy and y = x² + 3y + 8, which introduces complexity due to the mixed variable term.

Discussion Character

  • Exploratory, Problem interpretation, Assumption checking

Approaches and Questions Raised

  • The original poster seeks guidance on methods to handle the term 2xy within the equations. Some participants suggest factoring the first equation and transforming it, while others note that the second equation is linear in y, proposing substitution as a potential approach.

Discussion Status

Participants are exploring different methods to approach the simultaneous equations, with some offering specific techniques such as factoring and substitution. There is an ongoing examination of how to effectively split the equations based on the zero product property.

Contextual Notes

There may be assumptions regarding the nature of the variables and the methods allowed, as well as potential constraints related to the homework guidelines that participants are considering in their discussions.

jimmy42
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I have the following simultaneous equations. However I am unsure how to handle that 2xy. Can someone give a pointer to any known methods?

x= 3x^2+2xy
y=x^2+3y+8
 
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Just factor out the first equation so you can get x(1-3x-2y)=0 and then you transform the equation.
 
Second equation is linear in y, so you can solve by substitution.
 
After you have x(1-3x-2y)=0, you will then have to split that up with what you know about a*b=0.
 

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