Belajar matematika🧮
June 14, 2025 at 02:50 PM
✅ Pembahasan:
Gunakan rumus kuadrat:
x = (–b ± √(b² – 4ac)) / (2a)
Diketahui:
a = 2, b = –3, c = –5
Hitung diskriminan:
D = (–3)² – 4(2)(–5) = 9 + 40 = 49
x = [3 ± √49] / (2 × 2)
x = (3 ± 7) / 4
→ x₁ = (3 + 7) / 4 = 10 / 4 = 2,5
→ x₂ = (3 – 7) / 4 = –4 / 4 = –1
✅ Jawaban yang benar: 💜 x = 2,5 dan x = –1
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