Question

На облицовку стены пошло 504 плитки.Причем в каждом ряду плиток было на 3 меньше ,чем число рядов .Сколько было рядов? Очень надо!!!!!!!!Прошу!!!!

Answer 1

Пусть х- количество рядов. Тогда кол-во плиток в ряду: х-3
х(х-3)=504
х²-3х-504=0
Д=9-4*(-504)=2025
х1=(3+45)/2=24
х2=(3-45)/2=-21 - не подходит  по смыслу задачи
Отвео: 24 ряда

Answer 2

Problem Analysis

To solve this problem, we need to determine the number of rows of tiles based on the given information. We know that there are 504 tiles in total, and in each row, there are 3 fewer tiles than the number of rows.

Let's assume the number of rows is represented by the variable "x". We can set up the following equation to represent the given information:

x * (x - 3) = 504

We can solve this equation to find the value of "x", which will give us the number of rows.

Solution

To find the number of rows, we can solve the equation x * (x - 3) = 504.

Let's solve this equation step by step:

1. Expand the equation: x^2 - 3x = 504. 2. Rearrange the equation: x^2 - 3x - 504 = 0. 3. Factorize the quadratic equation: (x - 28)(x + 18) = 0. 4. Set each factor equal to zero and solve for "x": - x - 28 = 0, which gives x = 28. - x + 18 = 0, which gives x = -18. Since the number of rows cannot be negative, we discard this solution. 5. Therefore, the number of rows is 28.

So, there were 28 rows of tiles.

Answer

Based on the given information, there were 28 rows of tiles.

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