help solving this plsssssss
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Help Simultaneous equation watch
- Thread Starter
- 22-03-2009 18:25
- Study Helper
- 22-03-2009 19:49
Assuming you want to find the points of intersection.
A standard technique is to eliminate one of the variables. In this case looking at your second expression, you can express y in terms of x, then substitute this into the first equation.
You now have a quadratic in y, which can be factorised, but it's not the easiest one in the world.
Then plug your y values back into the second equation to get the corresponding x values.
- 22-03-2009 20:29
Don't forget those brackets when you sub the second equation into the first.
- 22-03-2009 20:31
in first equation make either X or Y the subject then plug in to the second equation....