How do you solve this ?

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4 Answers

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  • ?
    Lv 7
    2 months ago

    A = (x + 2)(x - 2) = 45 cm^2

    x^2 = 49

    x = 7 cm

  • rotchm
    Lv 7
    2 months ago

    Apply the exact same reasonning given to you in

    https://ca.answers.yahoo.com/question/index?qid=20...

    Looks like that you are not even trying. 

    Hopefully no one will spoil you the answer. That would be very irresponsible of them. 

  • ?
    Lv 7
    2 months ago

    (x+2)(x-2) = x^2 - 4 = 45

    x^2 = 49

    x = 7, discard -7

  • ?
    Lv 7
    2 months ago

    Area = (x+2)cm (x-2)cm = 45 cm²

                x² - 4 = 45

                x² = 49

                x = 7 cm ...............ANS

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