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chikooo
24.09.2020 •
Mathematics
A Premier League Soccer field dimensions are 115 yards (length) by 74 yards (Width). Find the ratio of the width to the perimeter of the soccer field in simplest fraction form.
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Ответ:
The expression is![\frac{y^{3}-y^{2}-6y-4}{y+1}=y^{2}-2y-4](/tpl/images/0435/2966/5a8f9.png)
For
Factors are
, ![(1-\sqrt{5})](/tpl/images/0435/2966/1a423.png)
Therefore![y^{3}-y^{2}-6y-4y=(y+1)(1+\sqrt{5})(1-\sqrt{5})](/tpl/images/0435/2966/e272a.png)
Step-by-step explanation:
Given expression can be written as![\frac{y^{3}-y^{2}-6y-4}{y+1}](/tpl/images/0435/2966/fe956.png)
By using synthetic division we can find factors of given expression
1 -1 -6 -4
-1 | 0 -1 2 4
| _____________________
1 0 -4 0
Therefore quadratic equation is![y^2-2y-4=0](/tpl/images/0435/2966/1a4fc.png)
Here a=1 , b=-2 and c=-4
Therefore
and ![y=1-\sqrt{5}](/tpl/images/0435/2966/90b5e.png)
The expression is![\frac{y^{3}-y^{2}-6y-4}{y+1}=y^{2}-2y-4](/tpl/images/0435/2966/5a8f9.png)
For
Factors are
, ![(1-\sqrt{5})](/tpl/images/0435/2966/1a423.png)
Therefore![y^{3}-y^{2}-6y-4y=(y+1)(1+\sqrt{5})(1-\sqrt{5})](/tpl/images/0435/2966/e272a.png)