Question

Упростите Выражение (a-3)-2(a+9) Решение

Answer 1

(a-3)-2(a+9) = a-3-2a-18 = -a-21.

Answer 2

Сначала раскрой скобки а потом вычетай
a-3-2a-18= -a-21

Answer 3

Simplifying the Expression (a-3)-2(a+9)

To simplify the expression (a-3)-2(a+9), we can follow the order of operations, which is parentheses, exponents, multiplication and division (from left to right), and addition and subtraction (from left to right).

Let's break down the steps:

1. Distribute the -2 to the terms inside the parentheses: -2(a+9) = -2a - 18

2. Now we have (a-3) - (-2a - 18). To subtract a negative number, we can change it to addition: (a-3) + (2a + 18)

3. Combine like terms: a + 2a - 3 + 18

4. Simplify further: 3a + 15

Therefore, the simplified expression is 3a + 15.

Please let me know if you need any further assistance!