kaitlyn4 kaitlyn4

27-02-2015
Mathematics

contestada

what is the zero for 2x2-7=4

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apologiabiology apologiabiology

27-02-2015

2x^2-7=4
subtract 4 from both sdies
2x^2-11=0
therefor
2x^2=11
divide by 2
x^2=5.5
square root both sdies
x=-2.345 or 2.345

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Panoyin Panoyin

28-02-2015

2x² - 7 = 4
      +7 +7
      2x² = 11
      2 2
      x² = 5 1/2
   x = √5 1/2

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