From MathWorld: "A quadratic equation is a second-order polynomial equation in a single variable x, , where ."
I don't see how xy=6 is quadratic.
Sorry guys for posting such basic question but I can't find it anywhere.
How fo you recognize a quadratic equation? I know about counting the degree and stuff but is there maybe a test that can be done to test each equation?
Like for example: 7x+4xy-2x+5y Is this a quadratic?
Oh and someone told me that xy=6 is also a quadratic...how is that? Because of degree?
THanks guys
Derg
Im thinking it depends on how you count the degrees, I've never fully grasped that idea of degrees though...How do you count degrees?
How about the equation 7x+4xy-2x+5y, is it a quadratic? My teacher specifically said that xy=6 is a quadratic, something about a circle being involved...
Any ideas guys?
Thanks a bunch
Derg
Got it
This is how my teacher defined it as : A Equation with a degree of 2 is considered as a quadratic equation, so technically xy=6 can be written as
x^1 time y^1 = 6 and the 1 degree from x and y add to be 2. But what exactly is degrees?
So I guess 7x+4xy-2x+5y is a quadratic according this definition...
Derg
Sorry.
So does this mean that xy=6 is a quadratic in definition? When I graphed it on my calculator (by dividing both sides my x and then graphing it) and found that it is 2 curved parabolas rotated, one in quadrant 2 and another in 4.
Thanks for the help!
Derg