P = 30
S = 56
P/2 = a+b = 15
S = a*b = 56
a = 15 - b
(15 - b)*b = 56
b^2 - 15b + 56 = 0
b1 = 7 ; b2 = 8
Ответ: длины сторон участка = 7 и 8
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P = 30
S = 56
P/2 = a+b = 15
S = a*b = 56
a = 15 - b
(15 - b)*b = 56
b^2 - 15b + 56 = 0
b1 = 7 ; b2 = 8
Ответ: длины сторон участка = 7 и 8