Branches and Loops (9/42 Branch:if Prompt the user for the coefficients of the equation disp ("This program finds the roots of a quadratic ') disp ('equation of the form A*X 2 +B*X+C=0.) a input ('Enter the coefficient A:'); b=input (Enter the coefficient B:) c=input ('Enter the coefficient C:') Calculate discriminant discriminant =b2-4 a c; Solve for the roots,depending on the value of the discriminant if discriminant >0%there are two real roots,so... x1 =(-b +sgrt(discriminant))/(2 a ) x2 =(-b-sgrt(discriminant))/(2 *a ) disp ('This equation has two real roots:) fprintf ('xI =%fn',x1); fprintf ('x2 =%fn',x2): elseif discriminant =0%there is one repeated root,so... x1=(-b)/(2*a方 disp ('This equation has two identical real roots:) fprintf ('xI =x2 =%f n',x1); else there are complex roots,so... real_part =(-b)/(2 a); imag part=sqt（abs(discriminant))/(2*a)方 disp ("This equation has complex roots:) fprintf('x1 =%f+i%fn',real_part,imag_part ) 细月济大学 TONGJI UNIVERSITY fprintf('x2=%f-i%fn',real_part,imag_part ) endBranches and Loops (9/42) Branch: if % Prompt the user for the coefficients of the equation disp ('This program finds the roots of a quadratic '); disp ('equation of the form A*X^2 + B*X + C = 0. '); a = input ('Enter the coefficient A: '); b = input ('Enter the coefficient B: '); c = input ('Enter the coefficient C: '); % Calculate discriminant discriminant = b^2 - 4 * a * c; % Solve for the roots, depending on the value of the discriminant if discriminant > 0 % there are two real roots, so... x1 = ( -b + sqrt(discriminant) ) / ( 2 * a ); x2 = ( -b - sqrt(discriminant) ) / ( 2 * a ); disp ('This equation has two real roots:'); fprintf ('x1 = %f\n', x1); fprintf ('x2 = %f\n', x2); elseif discriminant == 0 % there is one repeated root, so... x1 = ( -b ) / ( 2 * a ); disp ('This equation has two identical real roots:'); fprintf ('x1 = x2 = %f\n', x1); else % there are complex roots, so ... real_part = ( -b ) / ( 2 * a ); imag_part = sqrt ( abs ( discriminant ) ) / ( 2 * a ); disp ('This equation has complex roots:'); fprintf('x1 = %f +i %f\n', real_part, imag_part ); fprintf('x2 = %f -i %f\n', real_part, imag_part ); end