|4-x|=3 persamaan nilai mutlak

Bab Nilai Mutlak
Matematika SMA Kelas X

|4 - x| = 3

4 - x = 3
x = 4 - 3
x = 1

4 - x = -3
x = 4 + 3
x = 7

HP = {1, 7}

Mapel : Matematika
Kelas : X SMA
Materi : Persamaan Nilai Mutlak

Pembahasan :
Cara 1

|4 - x| = 3

4 - x = 3
x = 4 - 3
x = 1

4 - x = -3
x = 4 + 3
x = 7

Hp : {1 , 7}

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Cara 2

|4 - x| = 3
(4 - x)² = 3²
(4 - x)² - 3² = 0
(4 - x + 3)(4 - x - 3) = 0
(7 - x)(1 - x) = 0
x = 7
x = 1

Hp : {1 , 7}