tentukan himpunan |x-2| + |×+4| =7 jawab

|x-2| + |x+4| = 7
(2x + 2)² = 7²
4x² + 8x - 45 = 0
(2x - 5)(2x + 9) = 0
x = 5/2 (tdk memenuhi)
x = -9/2 memenuhi

Hp = {-9/2}