write a matlab command to find th roots of: ax^2+bx+c=0

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write a MATLAB commads to find the roots of : ax^2+bx+c=0 , where a,b and c are constants?

Accepted Answer

jahanzaib ahmad
jahanzaib ahmad on 13 Jan 2019
Edited: madhan ravi on 15 Jan 2019
a=1;
b=2;
c=3;
x1 = -b +(sqrt((b^2)-(4ac)/(2a))x;
x2=-b-(sqrt((b^2)-(4ac)/(2a));
disp(x1);
disp(x2);
  1 Comment
jahanzaib ahmad
jahanzaib ahmad on 14 Jan 2019
Edited: madhan ravi on 15 Jan 2019
a=1;
b=2;
c=3;
x1 = -b +(sqrt((b.^2)-(4.*a.*c)))/(2.*a);
x2=-b -(sqrt((b.^2)-(4.*a.*c)))/(2.*a);
disp(x1);
disp(x2);

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More Answers (2)

madhan ravi
madhan ravi on 14 Jan 2019
Edited: madhan ravi on 14 Jan 2019
help roots
doc roots
help poly2sym
doc poly2sym

Abu Samad
Abu Samad on 15 Apr 2022
ax^2+bx+c=0 where abc[1,-3,2]

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