0
x2 + y2 isn't an equation. Until you say it's equal to something, it's just an
expression, and its numerical value depends on the values of 'x' and 'y'.
If you say that the expression is equal to some number, the it's the equation
of a circle, with its center at the origin, and a radius equal to the square root
of the number.
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Earn +20 ptsQ: What does the equation x squared plus y squared represent?
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Is x squared plus 7x-30 equals 0 a linear equation?
No, It's a a quadratic equation because you have X squared.
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Is -2x squared plus 2x plus 1 equals 9 a quadratic equation?
Yes it is. The thing that makes it a quadratic equation is that "x squared" in there.
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You can't because it is not a quadratic equation.
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It is a quadratic equation in x.
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