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gianamvo301006
2 năm trước
2. Phân tích đa thức thành nhân tử: a) $16-x^{2}$ b) $16-3x+1^{2}$ c) $2x+5^{2}-$$9x^{2}$ d) $2x-1^{2}-3x-$$1^{2}$
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