A topic in the new observation of ninth grade mathematics. . . On the quadratic equation of one variable from the perspective of function - Training Enrollment Network

A topic in the new observation of ninth grade mathematics. . . On the quadratic equation of one variable from the perspective of function

(1).y=x squared -2x

(2) take y=3 and get x=- 1 or 3.

(3) when x

When 0

When-1

(4) the coordinates of p (3,3)

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