HP dari |x-2| + |x+4| = 7 ??

Bab Nilai Mutlak
Matematika SMA Kelas X

| x - 2 | + | x + 4 | = 7

x - 2 + x + 4 = 7
2x + 2 = 7
2x = 7 - 2
x = 5/2

x - 2 + x + 4 = - 7
2x + 2 = -7
2x = -7 - 2
x = -9/2

HP = { -9/2, 5/2 }