How do i plot this quadratic graph?
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I'm trying to plot this quadratic graph. For some reason it looks like this. It's not crossing the x axis for some reason the x axis are down. I need to fix it please.
This is the graph and the code.
2 个评论
Setsuna Yuuki.
2020-11-22
that depends on the values of "a" "b" and "c", perhaps those values do not allow zero crossing.
Yaseen Noaman
2020-11-22
回答（1 个）
x = -10:10;
y = polyval([1 -2 -4],x);
plot(x,y)
r = roots([1 -2 -4])
text(r(1),0,'\leftarrow Root')
text(r(2),0,'\leftarrow Root')
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2020-11-22
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