$\frac{5}{2}$ – $\frac{1}{2}$ ($x^{2}$ -5)=$\frac{1}{2}$

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$\frac{5}{2}$ – $\frac{1}{2}$ ($x^{2}$ -5)=$\frac{1}{2}$

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Ivy 11 phút 2021-10-10T15:41:19+00:00 2 Answers 0 views 0

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    0
    2021-10-10T15:42:26+00:00

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

    `⇔1/2(x^2-5)=5/2-1/2`

    `⇔1/2(x^2-5)=4/2`

    `⇔x^2-5=4/2 : 1/2`

    `⇔x^2-5=4`

    `⇔x^2=9`

    `⇔x=±3`

    0
    2021-10-10T15:42:57+00:00

    5/2-(x^2-5)/2=1/2    →(5-x^2+5)/2=1/2    →(10-x^2)/2=1/2     →10-x^2=1    →x^2=9    →x=3 hoặc x=-3

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35:5x4+1-9:3 = ? ( )