Предмет: Математика, автор: olya8383

площадь прямоугольника 72кв.см какова ширина прямоугольника если она в два раза короче чем длина

Ответы

Автор ответа: ZXR
0

S=72см²
x-длина
0,5x-ширина
 

S=a*b

72=0,5x²
x²=144

x=12

0,5x=12*0,5=6

Ответ:6 см

 

Автор ответа: 3akaT
0

х*2х=72
2х^2=72

x^2=36

x=корень из 36
х=6 

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