Plot second order polynomial

Description

It prints the polynomial and shows the min or max and the zeros.

Usage

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## S3 method for class 'Quadra'
plot(x,from=NULL,to=NULL, ...)

Arguments

x

Object of class Quadra.

from

min(x) on the plot

to

max(x) on the plot

...

Argument for other type of objects

Examples

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P1 <- Quadra(1,2,3)
plot(P1)