Nilai mutlak dari | 5x + 3 | = | 3x + 5 |
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Matematika WajibPersamaan Mutlak X SMA
Pembahasan :
|5x + 3| = |3x + 5|
(5x + 3)² = (3x + 5)²
(5x + 3)² - (3x + 5)² = 0
(5x + 3 + 3x + 5)(5x + 3 - 3x - 5) = 0
(8x + 8)(2x - 2) = 0
x = -1
x = 1
Hp : {-1 , 1}
5x - 3x = 5 - 3
2x = 2
x = 1
5x + 3 = -(3x+5)
5x +3 = -3x -5
5x +3x = -5 -3
8x = -8
x= -1
X1= 1, x2=-1
maaf kalau salah