Posted by M on Wednesday, September 3, 2014 at 10:59pm.
Which of these equations would not be in quadratic form?
A.X^413X^2+36=0
B.2X^(2/5)+X^(1/5)6=0
C.6x^3+2x^28X=0
D.3(2/x4)^2+5(2/x4)2=0
I think its between C or D. C because the exponents are different not doubled and D because its set up is completely the opposite from all the others.

Math  Steve, Thursday, September 4, 2014 at 12:13am
It is in fact C
D is just a quadratic in (2/x4), because if you substitute u=2/x4, you have just 3u^2+5u2=0
It is C because as you say, there is not
a term with twice the exponent of the other.

Math  Anonymous, Tuesday, September 30, 2014 at 8:52pm
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