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Mapel : Matematika Wajib (Kelas X SMA)Materi : Nilai Mutlak
Indikator : Mencari HP dalam suatu persamaan nilai mutlak
Langkah Penyelesaian :
|2y + 5| = |7 - 2y|
- Kuadratkan kedua ruas :
(2y + 5)² = (7 - 2y)²
4y² + 20y + 25 = 49 - 28y + 4y²
20y + 28y = 49 - 25
48y = 24
y = 24/48
y = 1/2
Jawaban :
Persamaan nilai mutlak |2y + 5| = |7 - 2y|, memiliki y = 1/2