Question

Раскройте скобки а) c + ( a + b)б) c - ( a-b)в) x-(a-b)+(c-d)​

Answer 1

Ответ:

$a) \: c + (a + b) = c + a + b \\ b) \: c - (a - b) = c - a + b \\ c) \: x - (a - b) + (c - d) = x - a + b + c - d$

Answer 2

a) (a + b)

The expression (a + b) represents the sum of the variables a and b. To evaluate this expression, you would simply add the values of a and b together.

For example, if a = 3 and b = 5, then (a + b) would be equal to 3 + 5, which is 8.

b) c - (a - b)

The expression c - (a - b) represents the subtraction of the result of (a - b) from the variable c. To evaluate this expression, you would first calculate (a - b) and then subtract that result from c.

For example, if c = 10, a = 3, and b = 5, then (a - b) would be equal to 3 - 5, which is -2. Therefore, c - (a - b) would be equal to 10 - (-2), which is 10 + 2, resulting in 12.

c) x - (a - b) + (c - d)

The expression x - (a - b) + (c - d) represents the sum of the variables x, (a - b), and (c - d). To evaluate this expression, you would first calculate (a - b) and (c - d), and then add the results to x.

For example, if x = 10, a = 3, b = 5, c = 8, and d = 2, then (a - b) would be equal to 3 - 5, which is -2, and (c - d) would be equal to 8 - 2, which is 6. Therefore, x - (a - b) + (c - d) would be equal to 10 - (-2) + 6, which is 10 + 2 + 6, resulting in 18.

Please let me know if you have any further questions!

Answer 3

а) Раскроем скобки: c + (a + b)

При раскрытии скобки сложим элементы внутри скобок: c + a + b

б) Раскроем скобки: c - (a - b)

При раскрытии минуса внутри скобки, поменяем знаки всех элементов: c - a + b

в) Раскроем скобки: x - (a - b) + (c - d)

При раскрытии минуса внутри первой скобки, поменяем знаки всех элементов: x - a + b + (c - d)

Затем, при раскрытии скобок суммируем все элементы: x - a + b + c - d