Toán Lớp 9: (\sqrt{x} – 1)/(x+3) = (\sqrt{x} -2)/(\sqrt{x}+1) (ĐK: x ≥ 0)
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Toán Lớp 9: (\sqrt{x} – 1)/(x+3) = (\sqrt{x} -2)/(\sqrt{x}+1) (ĐK: x ≥ 0)
Comments ( 1 )
=> (√x – 1)(√x + 1) = (√x – 2)(√x + 3)
(=) x – 1 = x + √x – 6
(=) – 1 + 6 = x + √x – x
(=) √x = 5
(=) x = 25 (nhận)