giai giup em cau 2 luy thua x +2luy thua x+3 =144

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giai giup em cau 2 luy thua x +2luy thua x+3 =144

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Nick 4 years 2020-11-13T08:47:11+00:00 1 Answers 47 views 0

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  1. Delwyn
    0
    2020-11-13T08:48:53+00:00
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    $2^x+2^{x+3}=144$

    $\Leftrightarrow 2^x+2^x.2^3=144$

    $\Leftrightarrow 2^x(1+2^3)=144$

    $\Leftrightarrow 9.2^x=144$

    $\Leftrightarrow 2^x=16$

    $\Leftrightarrow 2^x=2^4$

    $\Leftrightarrow x=4$

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