Toán Lớp 9: Rút gọn A= √x+1/√x-3 -7√x+3/x-9 + 2√x/√x+3 -

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Toán Lớp 9: Rút gọn A= √x+1/√x-3 -7√x+3/x-9 + 2√x/√x+3