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Solve Solve: x^4 + -18x^2 + 21 = 0 — Step-by-Step Solution by AhaStep | AhaStep

Home›Math›Solve Solve: x^4 + -18x^2 + 21 = 0 — Step-by-Step Solution by AhaStep

📐 MathLevel 2 — 🟢 Basiccubic👁 20 views⏱ 1 min read

Solve Solve: x^4 + -18x² + 21 = 0 — Step-by-Step Solution by AhaStep

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Solve: x^4 + -18x^2 + 21 = 0

✨Detailed Solution

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1. 📝 Identify: Biquadratic equation: 18x^{2} + 21$ = 0$

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2. 🔄 Substitution:

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Equation becomes: 18t + 21$ = 0$

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3. 📐 Discriminant: = (-18)² - 4·1·21 = 240

🔒 5 steps remaining

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