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OpenStudy (anonymous):
x^4+2ix-3x^2-yi=3-5i+1+2iy what are the values of x and y
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terenzreignz (terenzreignz):
First, simplify the right part. Might as well do the left part, too...
OpenStudy (anonymous):
x^4-3x^2=4 and 2x-3y+5=0
OpenStudy (anonymous):
plz simplify furthur
terenzreignz (terenzreignz):
You can solve for x in this equation
\[\huge x^4-3x^2 = 4\]
terenzreignz (terenzreignz):
For which there are many possible values, possibly...
\[\huge x^4 - 3x^2 - 4 = 0\]
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terenzreignz (terenzreignz):
Oh, and before you panic, maybe you can let \[\huge u = x^2\]and solve for u instead...
terenzreignz (terenzreignz):
\[\huge u^2-3u-4 = 0\]
terenzreignz (terenzreignz):
@leena1996 work with me here.
terenzreignz (terenzreignz):
I do hope x is only allowed to take real number values, though....
OpenStudy (anonymous):
ya i got x=+/-2 and y should be 1/3 but i am getting it as 3....
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terenzreignz (terenzreignz):
I wonder why...
\[\huge 2x -3y + 5 = 0 \]\[\huge2(\pm2)-3y +5 = 0\]\[\huge \pm4-3y=-5\]\[\huge -3y=-5\mp4\]
\[\huge y = \frac{5\pm4}{3}\]
terenzreignz (terenzreignz):
It seems both 1/3 and 3 are possible, @leena1996
depending on which value of x you pick ...
If x = 2, then y = 3
If x = -2, then y = 1/3
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