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Phân tích thành nhân tử
[TEX]a) x^2 + 4x + 5[/TEX]
[TEX]b) x^2 - x + 6[/TEX]
[TEX]c) x^2 - x + 15[/TEX]
[TEX]d) x^2 - 3x + 5[/TEX]
[TEX]e) x^2 + x + 15[/TEX]
[TEX]g) x^2 - x - 15[/TEX]
~~> Chú ý latex
[TEX]a) x^2 + 4x + 5[/TEX]
[TEX]b) x^2 - x + 6[/TEX]
[TEX]c) x^2 - x + 15[/TEX]
[TEX]d) x^2 - 3x + 5[/TEX]
[TEX]e) x^2 + x + 15[/TEX]
[TEX]g) x^2 - x - 15[/TEX]
~~> Chú ý latex
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