Write the program discussed in the problem, but just enter the values in the fil

Question

Write the program discussed in the problem, but just enter the values in the file rather than asking the user to enter them. Run the Program 3 times to find the real roots of the following equations.

a) x^2 + 6x + 2 = 0

b) -2x^2 + 20x - 25 = 0

c) 3x^2 + 6x + 9 = 0

The orgiinal progblem (Pg 211 Problem 11 Matlab):

Write a program in a script file that determines the real roots of a quadratic equation ax^2 + bx + c = 0 . Name the file quadroots . When the file runs, itasks the user to enter the values of the constants a , b , and c . To calculate theroots of the equation the program calculates the discriminant D , given by:

D = b^ 2 - 4ac

If D > 0, the program displays message

Explanation / Answer

array=input('Specify the coefficients of the quadratic as a row array"[a,b,c]":');

a=array(1);b=array(2);c=array(3);

if (a==0) && (b==0)

fprintf('The equation is degenerate');

end

if (a==0) && (b~=0)

fprintf('There is a single root at %g. ', -c/b);

end

if (a~=0) && (c==0)

fprintf('There are two real roots at 0 and %g. ', -b/a);

end

if (a~=0) && (c~=0)

root1=((-b+sqrt(b*b-4*a*c))/(2*a));

root2=((-b-sqrt(b*b-4*a*c))/(2*a));

if isreal(root1)

fprintf('There are two real roots at %g and %g. .', root1,root2);

else

fprintf('The roots are complex: ');

fprintf(' ');

disp(root1);

fprintf(' and ');

disp(root2);

end

end

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