" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Matematika SMP Kelas VIII
1] 4/(x + 3) - 5/(x - 1)
= (4 (x - 1) - 5 (x + 3)) / ((x + 3) (x - 1))
= (4x - 4 - 5x - 15) / (x² + 2x - 3)
= (-x - 19) / (x² + 2x - 3)
2] 3/(2x + 5) + 2/(6x² + 7x - 20)
= (3 (6x² + 7x - 20) + 2 (2x + 5)) /((2x + 5) (2x + 5) (3x - 4))
= (18x² + 21x - 60 + 4x + 10) / ((2x + 5) . (2x + 5) (3x - 4))
= (18x² + 25x - 50) / ((2x + 5) . (2x + 5) . (3x - 4))
= ((2x + 5) (9x - 10)) / ((2x + 5) (2x + 5) (3x - 4))
= (9x - 10) / (6x² + 7x - 20)
3] (2a / 3x) . (2x - 6xy) / (12a)
= (2a / 12a) . (x (2 - 6y))/3x
= 1/6 . (2 (1 - 3y))/3
= (1 - 3y) / 9