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Mathematics 18 Online
OpenStudy (anonymous):

How many roots does y = x^2 - 6x + 9 have? It may help to graph the equation

OpenStudy (saifoo.khan):

x = 3 x = 3

OpenStudy (anonymous):

The graph is a parabola and the only (double) root is for x=3.

OpenStudy (anonymous):

Which of the following polynomials does not have real roots? A.-x^4 + 5x^2 + 6 B.x^2 + x + 7 C.x^2 + 4x - 4 D.2x^4 + 13x^3 + 21x^2

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