H
hoamaitrang_1996


Giai pt vo ty sau :
[TEX]2\sqrt{3x+7} + 3\sqrt{5x+14} = x^2 + 8x + 20[/TEX]
minh tinh dc co 1 nghiem x = -1
[TEX]2\sqrt{3x+7} + 3\sqrt{5x+14} = x^2 + 8x + 20[/TEX]
minh tinh dc co 1 nghiem x = -1
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