Assigning roots as variables to a function

I have x^2+5*x+6=0.

I see the roots with the root command but i want to set them as variables to a new function. Also how can i set them to two different displays? I want to write down:

sprintf( 'the first root:%f and the second root:%f')

Answer 1

[Pat Gipper]

The output of the roots function can be assigned to a workspace array variable and printed out as you wanted. See the simple example below. You would have to adapt the formatting for complex roots.

x=roots([1,5,6]);
sprintf('the first root:%f and the second root:%f',x)

[Walter Roberson]

Note: all of the % formats for sprintf() and fprintf() ignore the complex portion of a value, so if you are dealing with complex values you should use real() and imag() to break them into pieces,

[John Blaz]

Thank you for your reply.

This is my script:

clc

clear

a=input('input the first number at x^2:');

b=input('input the second number at x:');

c=input('input the third number:');

[x1,x2]=ad(a,b,c);

sprintf('first root is: %f,second root is: %f',x1,x2)

And this is my function:

function [x1,x2] = ad(a,b,c)

%second degree equation

f=[a b c];

y=([roots(f)])

y(1)=x1

y(2)=x2

end

What am i doing wrong, in order toassign the roots to x1 and x2?

[Pat Gipper]

You just need to swap variables y and x in the function assignment,

x1=y(1);

x2=y(2);

[John Blaz]

It worked thank you.