answer to a quadratic function

2020 9 30
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更新时间：2020 9 30
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Hi
how do I get both of my solution in a quadratic function? I only have the answer for x1

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回答（1 个）

Matt J
Matt J 2020-9-30

0 个投票

For example,
>> roots([1,5,2]) %roots of x^2+5*x+2
ans =
-4.5616
-0.4384

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Agatha E. Johnson
Agatha E. Johnson 2020-9-30
Hm, thanks for the answer. But when I do that the answer is not right.
this is the function, and how i didi it
  1. y = x^2+ x − 12,
function [x1, x2] = myquadratic(a,b,c)
a = 1;
b = 1;
c = -12;
X = sqrt(b^2-4*a*c);
Y = 2*a;
x1 = (-b + X) / Y;
x2 = (-b - X) / Y;
here I only get
ans= 3
but i would like to get
ans=-4 as well
Matt J
Matt J 2020-9-30
In all likelihood, that is because you did not call the function with 2 output arguments.
K>> [x1,x2]=myquadratic()
x1 =
3
x2 =
-4

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