Question

A(a - 2) - (a - 1)(a + 1).​

Answer 1

Ответ:

a^2-2a-a^2-a+a+1=-2a+1

Answer 2

To simplify the expression A(a - 2) - (a - 1)(a + 1), you can follow these steps:

1. Distribute A into the terms inside the first set of parentheses: A(a - 2) = Aa - 2A

2. Distribute the second set of parentheses using the distributive property: -(a - 1)(a + 1) = -a(a) - a(1) + 1(a) - 1(1) = -a^2 - a + a - 1 = -a^2 - 1

3. Now, you can rewrite the expression with the simplified terms: A(a - 2) - (a - 1)(a + 1) = (Aa - 2A) - (-a^2 - 1)

4. Next, remove the parentheses and combine like terms: Aa - 2A + a^2 + 1

So, the simplified expression is Aa - 2A + a^2 + 1.