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Giải: x^4 + -17x^2 + 21 = 0 — Detailed Solution | AhaStep

Home›Math›Giải: x^4 + -17x^2 + 21 = 0

📐 MathLevel 2 — 🟢 Basiccubic👁 16 views⏱ 1 min read

Giải: x^4 + -17x² + 21 = 0

📝 Problem

x^4 + -17x^2 + 21 = 0

✨Detailed Solution

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1. 📝 Nhận dạng: PT trùng phương: 17x^{2} + 21$ = 0$

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2. 🔄 Đặt ẩn phụ: Đặt (ĐK:

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PT trở thành: 17t + 21$ = 0$

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3. 📐 Biệt thức: = (-17)² - 4·1·21 = 205

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Solve Solve the quadratic equation: 4x² - 28x - 106 = 0 — Step-by-Step Solution by AhaStep