B
bigtbang


câu 1 $\sqrt{3-x+x^2}-\sqrt{2+x-x^2}=1$
câu 2 $\sqrt{3x-2}+\sqrt{4-x}=4x-9+2\sqrt{3x^2-5x+2}$
Chú ý gõ latex nhé!
câu 2 $\sqrt{3x-2}+\sqrt{4-x}=4x-9+2\sqrt{3x^2-5x+2}$
Chú ý gõ latex nhé!
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