# Complex Simultaneous Equation. :) Helpp.Watch

#1
2x² + y² = 3r
2y = x + 4 - 6r

Ive used y = 0.5x + 2 - 3r, to sub back into the first equation, and after expanding and simplifying, I got:

9x² + 8x = 12 - 36r² +24r

Then I solved these equations,

9x² + 8x = 0 (x = -08889, 0)
12 - 36r² +24r = 0 (r = 1 , -0.33333)

now what do I do?

Ive never seen any question like this in C1.
0
9 years ago
#2
If you have three variables, you need three bits of information. You have two (i.e. two separate equations), is there no other information given, such as 'x, y and r are integers'? Surely this isn't C1 standard?
0
9 years ago
#3
I don't think you're going to get unique solutions to those equations (in fact there might not be any solutions). The only way i can see to solve it is let r=1 and solve for x and y.
0
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