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lekhanh112001
2 năm trước
a) (x + 3)mũ2 + (4 - x)(x + 4) = 1 tìm x b) (2 - x)mũ3 +(3 +x)(9 - 3x + xmũ2) + 6x(1 - x) = 17; c) x mũ4 - 2xmũ2 +1 = 0. tìm x nha mng cần gấp ạ
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