Question

A soccer field has a perimeter of 326 metres. Its area is 6370 square metres. What are the dimensions of the field?

Answer 1

Explanation:

chiều dài:x,x>0

chiều rộ:y

`\left \{ {({x+y)*2=326} \atop {xy=6370}} \right.`

`\left \{ {{x+y=163} \atop {xy=6370}} \right.`

`\left \{ {{y=163-x} \atop {xy=6370}} \right.`

`\left \{ {{y=163-x} \atop {x*(163-x)=6370}} \right.`

`\left \{ {{y=163-x} \atop {163x-x^(2) =6370}} \right. \\`

`\left \{ {{y=163-x} \atop {x_(1) =98; x_(2) =65}} \right.`

`\left \{ {{y=65} \atop {x=98}} \right.`