1. |2x+3| =149 2. |2x-5| =3x+9 Bantu jawab ya materi nilai mutlak kelas 10 sma

Mapel : Matematika
Kelas : X SMA
Bab : Mutlak

Pembahasan :
|2x + 3| = 149
(2x + 3)² = 149²
(2x + 3)² - 149² = 0
(2x + 152)(2x - 146) = 0
x = -76
x = 73

Hp : {-76 , 73}

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|2x - 5| = 3x + 9

2x - 5 = 3x + 9
3x - 2x = -5 - 9
x = -14

2x - 5 = -3x - 9
2x + 3x = -9 + 5
5x = -4
x = -4/5

Hp : {-14 , -4/5}

1. |2x+3| =149
2x + 3 = 149
2x = 146
x = 73
atau
2x +3 = -149
2x = -152
x = -76

Hp= {-76,73}

2.(2x-5)² =(3x+9)²
=> 4x² - 20x +25 = 9x² + 54x + 81
=> 5x² + 74x + 56
=> (5x + 4)(x+ 14)
x = -4/5 V x = -14
Hp={-14,-4/5}