Ai giúp em với!!!!!! Tìm x ạ

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Ai giúp em với!!!!!! Tìm x ạ

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Ai giúp em với!!!!!! Tìm x ạ
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Môn Toán Ladonna 4 years 2020-11-27T01:08:59+00:00 2020-11-27T01:08:59+00:00 2 Answers 50 views 0

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

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Sigrid · Answer 1 · 2020-11-27T01:10:35+00:00

Sigrid

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2020-11-27T01:10:35+00:00 November 27, 2020 at 1:10 am

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Đáp án:

Giải thích các bước giải:

$b) (2 x - 3)^{2} = 9$

$\Leftrightarrow$ $[\begin{array}{l} (2 x - 3)^{2} = 3^{2} \\ (2 x - 3)^{2} = (- 3)^{2} \end{array}$

$\Leftrightarrow$ $[\begin{array}{l} 2 x - 3 = 3 \\ 2 x - 3 = - 3 \end{array}$

$\Leftrightarrow$ $[\begin{array}{l} 2 x = 6 \\ 2 x = 0 \end{array}$

$\Leftrightarrow$ $[\begin{array}{l} x = 3 \\ x = 0 \end{array}$

$c) (x - \frac{1}{3})^{2} = \frac{1}{25}$

$\Leftrightarrow$ $[\begin{array}{l} x - \frac{1}{3} = \frac{1}{5} \\ x - \frac{1}{3} = \frac{- 1}{5} \end{array}$

$\Leftrightarrow$ $[\begin{array}{l} x = \frac{8}{15} \\ x = \frac{2}{15} \end{array}$

Philomena · Answer 2 · 2020-11-27T01:10:41+00:00

Philomena

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2020-11-27T01:10:41+00:00 November 27, 2020 at 1:10 am

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`b)(2x-3)^2=9`

`(2x-3)^2=3^2`

`2x-3=3`

`2x=6`

`x=3`

`c)(x-1/3)^2=1/25`

`(x-1/3)^2=(1/5)^2`

`x-1/3=1/5`

`x=8/15`

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