KLO JNGAN NGASAL klo ngasal
ak REPORT
Materi : Bentuk dan Persamaan kuadrat
______________________________
x² + 8x + 15 = 0
x² + 8x + (8/2)² = - 15 + (8/2)²
( x + 4 )² = - 15 + 4²
( x + 4 )² = - 15 + 16
( x + 4 )² = 1
x + 4 = ±√1
x = - 4 ± 1
Himpunan Penyelesaian
x = -3 atau x = -5
______________________________
x² + x - 12 = 0
x² + x + (½)² = 12 + (½)²
( x + ½ )² = 12 + ¼
( x + ½ )² = 48/4 + 1/4
( x + ½ )² = 49/4
x + ½ = ± √49/4
x = - ½ ± 7/2
Himpunan Penyelesaian
x = 6/2 = 3 atau x = -8/2 = -4
______________________________
2x² + 5x + 2 = 0
x² + (5/2)x + 1 = 0
x² + (5/2)x + (5/4)² = - 1 + (5/4)²
( x + 5/4 )² = - 16/16 + 25/16
( x + 5/4 )² = 9/16
x + 5/4 = ± √9/16
x = - 5/4 ± ¾
Himpunan Penyelesaian
x = -2/4 = -½ atau x = -8/4 = -2
______________________________
3x² - 2x - 5 = 0
x² - ⅔x - 5/3 = 0
x² - ⅔x + (-⅓)² = 5/3 + (-⅓)²
( x - ⅓ )² = 15/9 + ⅑
( x - ⅓ )² = 16/9
x - ⅓ = ± √16/9
x = ⅓ ± 4/3
Himpunan Penyelesaian
x = 5/3 atau x = -3/3 = -1
______________________________
x² + 8x + 16 = 0
x² + 8x + (8/2)² = - 16 + (8/2)²
( x + 4 )² = - 16 + 16
( x + 4 )² = 0
x + 4 = ± √0
x = -4 ± 0
Himpunan Penyelesaian
x = 4 atau x = 4
______________________________
Semoga bisa membantu
[tex] \boxed{ \colorbox{navy}{ \sf{ \color{lightblue}{ Answer\:by\: BLUEBRAXGEOMETRY}}}} [/tex]
[answer.2.content]
