Предмет: Математика, автор: arifibragimov

Сумма длин оснований трапеции на 7 см больше высоты. Найди высоту трапеции если площадь трапеции 114 см

Ответы

Автор ответа: NeZeRAvix

S=(a+b)/2*h
a+b=7+h

114=7+h/2*h

228=7x^2+x

x+7x-228=0

x1+x2=-7
x1x2=-228

x1=12
x2=-19 не удовлетворяет условиям задачи

Ответ: 12

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