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Inga30

Ответ:

2. Система уравнений:  

Р=2(a+b)  

S=a*b  


28=2(a+b) a=14-b  

40=a*b  


(14-b)*b-40=0  

14b-b^2-40=0  

b^2-14b+40=0  


b1 = 10 a1=14-10=4  

b2 = 4 a2=14-4=10  

Ответ: стороны прямоугольника 10 и 4 метра

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