Предмет: Алгебра, автор: tupitsynvolodymyr

Детская площадка имеет форму прямоугольника, площадь которого равна 56 м2. Одна его сторона на 1 метр(-ов, -а) больше, чем другая. Детской площадке необходимо построить бордюр. В магазине продаётся материал для бордюра в упаковках. В одной упаковке имеется 22 метров(-а) материала.

Ответы

Автор ответа: Space273
1

Ответ:2 упаковки

Объяснение:

S=ab

a=b+1

S=b(b+1)

S=b²+b

56=b²+b

b²+b-56=0

D=1+224=15²

b=(-1±15)/2

b=-8(не удовлетворяет условиям задачи);7

a=b+1=8

P=2(a+b)=2(7+8)=30

В одной упаковке 22 метра, то есть нужно 2 штуки

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