WEBVTT

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Chúng ta cần cộng và rút gọn và chúng ta có căn bậc hai chính của 2X bình cộng 4 nhân

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căn bậc hai chính của 8 cộng 3 nhân căn bậc hai chính của 2X bình cộng căn bậc hai chính của 8.

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