3x^-2 -3x^2 is not a quadratic equation because it does not take the form ax^2 +bx+c.
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3x2 + 5x + 2 is a quadratic expression that can be factored as follows: 3x2 + 5x + 2 = 3x2 + 3x + 2x + 2 = 3x(x + 1) + 2(x + 1) = (3x + 2)(x + 1)
3x + 2y = 8 2y=8-3x y=4-1.5x A quadratic has x^2 This is the equation of a line with negative slope.
A quadratic. For example, x^2 + 3x - 7xy - 12y - 25 = 0
The answer is 3. :p
(3x + 2)(x - 5) = 0 x = -2/3 or 5