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20λ²ˆμ€Β λ‚˜λ¬΄μœ„ν‚€μ—μ„œ 2차방정식 μ¨μ•Όλœλ‹€ ν•΄μ„œ μ•ˆν‘ΈλŠ” 풀이 λ§Œλ“€μ–΄λ΄„.


19λ²ˆλ„ μ§ˆλŸ‰μ€‘μ‹¬κ³Όμ˜ μƒλŒ€μ†λ„ 크기가 μ•ˆλ°”λ€λ‹€λŠ” μ„±μ§ˆ μ“°λ©΄ 더 μ‰¬μ›Œμ§€λ”λΌ