lecture_14 - T f I x M w aQ/bs> Var/M108(91414 meng...

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L{y!:w>{ ' . . ‘ 6+ (3>5) _ ‘ ‘55:?2‘ _ - 3 ‘ / 2 r 619.2 3:231» ’2} I: ‘y ,U/ ' " ("~‘2 ~ ' , ‘ . .." . 3 ; V _ * 7t “31’” “59"‘5‘4W‘L awwv- \WW owl 5: = § #19. RIO S? 4242’» [a : SOZqJ/‘oh la Ha ulna/(L e maul/m, 9: 267+ 62:“ =0 ‘Q; 61“!“‘3 _€ _ (7[ 9:0: :3”; __ng§ 6/5: U} %)a: )9, = else : Lw ra/ raiser/$1, /* solution of the quadratic equation axA2+bx+c=0 */ #include <stdio.h> #include <math.h> /* needef for printf and scanf */ /* needed for sqrtf */ main() { float a, b, c; /* quadratic equation coefficients */ float D; /* determinant */ float x1, x2; /* solution(s) */ /* get equation coefficients */ printf("Enter a, b, and c: ")3 scanf("%f %f %f", &a, &b, &c)3 printf("Solving equation %fx“2+%fx+%f=6\n", a, b, c); /* compute solution */ D = b * b - 4 * a * c; /* compute determinant */ if (D > a) { /* two real roots exist */ x1 x2 (-b + sqrtf(D)) / (2 * a); (-b - Sthf(D)) / (2 * a); } else if (D == 0) /* only one root exists */ x1 = -b / (2 * a); /* print results */ if (D > o) printf("x1=%f, x2=%f\n", x1, x2); else if (D == 9) printf("x=%f\n“, x1); else printf("No real roots exist\n"); $ls quadratic.c S gcc quadratic.c -lm -o quadratic Sis quadratic quadratic.c $ quadratic Enter a, b, and c: 1 2 -8 Solving equation 1.000000x"2+2.000000x+-8.000000=0 x1=2.000000, x2=-4.000000 $ ./quadratic Enter a, b, and c: 1 -10 25 Solving equation 1.000000xA2+-10.000000x+25.OOOOOO=O x=5.000000 S ./quadratic Enter a, b, and c: 5 -2 2 Solving equation 5.000000x"2+-2.000000x+2.000000=0 No real roots exist $ ...
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  • Fall '09
  • KOSBAR
  • Quadratic equation, Elementary algebra, real roots, quadratic equation coefficients, quadratic equation axA2+bx+c=0, €6¥Wm 0133M gram

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