Question

3a(a-2)-(a-3)*(a-3)=

Answer 1

^ это значёк возведения в степень

3a^2-6a-(a^2-3a-3a+9)

3a^2-6a-a^2+3a+3a-9

2a^2-9

Answer 2

To simplify the given expression, follow these steps:

1. Expand the terms within the parentheses: 3a(a - 2) = 3a^2 - 6a (a - 3)*(a - 3) = (a - 3)^2 = (a - 3)(a - 3) = a^2 - 6a + 9

2. Substitute the expanded terms back into the original expression: 3a(a - 2) - (a - 3)*(a - 3) = 3a^2 - 6a - (a^2 - 6a + 9)

3. Distribute the negative sign to each term inside the second set of parentheses: 3a^2 - 6a - a^2 + 6a - 9

4. Combine like terms: (3a^2 - a^2) + (-6a + 6a) - 9

5. Simplify the expression further: 2a^2 - 9

So, the simplified expression is: 2a^2 - 9