Quadratic equation & Minus B

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Fergal Ahern
Fergal Ahern 2019-5-15
回答： Pavi thra 2020-10-28
How do I solve the quadratic equation ax^2+bx+c=0 using the minus b formula, x=-b+- sqrt b^2-4ac/2a on MATLAB
Thank you
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Fergal Ahern
Fergal Ahern 2019-5-15
编辑：Fergal Ahern 2019-5-15
Geoff - The program must read in coefficients a,b and c from the keyboard and then calculate the roots of the equation. Do you know how I would verify that real roots are generated?

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kirti singh
kirti singh 2019-5-16
The following example code snippet works for accepting the coefficients a,b and c and calculating the roots and finding if they are real or not:
a1 = 'Enter value of a ';
a = input(a1)
b1= 'Enter value of b ';
b = input(b1)
c1= 'Enter value of c ';
c = input(c1)
x1 = (-b + sqrt(b^2 - (4 * a * c))) / (2 * a);
x2 = (-b - sqrt(b^2 - (4 * a * c))) / (2 * a);
t1=isreal(x1);
t2=isreal(x2);
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James Tursa
James Tursa 2019-5-16
Please don't post complete solutions to homework problems.

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Pavi thra
Pavi thra 2020-10-28
a1 = 'Enter value of a ';
a = input(a1)
b1= 'Enter value of b ';
b = input(b1)
c1= 'Enter value of c ';
c = input(c1)
x1 = (-b + sqrt(b^2 - (4 * a * c))) / (2 * a);
x2 = (-b - sqrt(b^2 - (4 * a * c))) / (2 * a);
t1=isreal(x1);
t2=isreal(x2);

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