how to draw a quadratic equation

3 vues (au cours des 30 derniers jours)
ibrahim alzoubi
ibrahim alzoubi le 3 Mai 2021
how to draw this quadratic equation, when I tried to draw it it gives me a linear draw :(
syms x
y=(-53.68/(2*230))*((x).^2)+500.0089*x+55
figure
fplot(y,[-55 55])
grid

Réponses (1)

Star Strider
Star Strider le 3 Mai 2021
It is definitely close to linear in the region you are plotting it.
To plot it and see its quadratic shape, find the inflection point and use that as the centre of the plot range.
Try this —
syms x
y=(-53.68/(2*230))*((x).^2)+500.0089*x+55
y = 
y_inflpt = vpasolve(diff(y)==0)
y_inflpt = 
2142.3630216095379293298534164136
figure
fplot(y,[-55 55]+double(y_inflpt))
grid
.

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