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Toán Lớp 9: √4x^2+5x+1-√2x^2-x+1=(√4x^2+5x+1)^2-(√2x^2-x+1)^2=

Home/ Toán Lớp 9: √4x^2+5x+1-√2x^2-x+1=(√4x^2+5x+1)^2-(√2x^2-x+1)^2=

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