Tất cả căn 4x-2 nhân căn 4x-1 + tất cả căn 4x+2 nhân căn 4x-1

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Môn Toán Eirian 4 years 2020-11-19T03:44:16+00:00 2020-11-19T03:44:16+00:00 1 Answers 57 views 0

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Captcha* Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )

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Cherry · Answer 1 · 2020-11-19T03:45:54+00:00

Cherry

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2020-11-19T03:45:54+00:00 November 19, 2020 at 3:45 am

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$\sqrt{4 x - 2}$ . $\sqrt{4 x - 1}$ + $\sqrt{4 x + 2}$ . $\sqrt{4 x - 1}$

= $\sqrt{4 x - 1}$ . ( $\sqrt{4 x - 2}$ + $\sqrt{4 x + 2}$ )

= [ $\sqrt{4 x - 1}$ . ( $\sqrt{4 x - 2}$ + $\sqrt{4 x + 2}$ ) ]²

= $(4 x - 1) (4 x + 2 + 4 x - 2 + 2$ $\sqrt{(4 x - 2) (4 x + 2)}$ )

= (4x-1)(8x+ 2 $\sqrt{8 x ² - 4}$

= (4x-1)(8x+ 2 $\sqrt{4 (2 x ² - 1)}$

= (4x-1)(8x+ 4 $\sqrt{2 x ² - 1}$