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Toán Lớp 9: Rút gọn a, (√28 – √12 – √7).√7 + √21 b, (√6 + √5)^2 – √120

Home/ Toán Lớp 9: Rút gọn a, (√28 – √12 – √7).√7 + √21 b, (√6 + √5)^2 – √120

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