Question

(a+3)(a-3)+(a+2)(a-2)-a(2a+1)+4

Answer 1

(a+3)(a-3)+(a+2)(a-2)-a(2a+1)+4
4+(3+a)(-3a)(2+a)(-2+a)-a(1+2a)
Я не понял чего ты хотел, наверное, чтобы выражение упростили, ну что ж, я упростил как смог

Answer 2

To simplify the expression (a+3)(a-3) + (a+2)(a-2) - a(2a+1) + 4, you can use the distributive property and then combine like terms. Here's the step-by-step simplification:

1. Expand the first two terms using the distributive property: (a+3)(a-3) = a(a-3) + 3(a-3) = a^2 - 3a + 3a - 9 = a^2 - 9

2. Expand the next two terms using the distributive property: (a+2)(a-2) = a(a-2) + 2(a-2) = a^2 - 2a + 2a - 4 = a^2 - 4

3. Expand the fourth term using the distributive property: -a(2a+1) = -2a^2 - a

Now, the expression becomes: (a^2 - 9) + (a^2 - 4) - (2a^2 + a) + 4

4. Combine like terms: a^2 + a^2 - 2a^2 - 9 - 4 + 4

5. Simplify further: (2a^2 - 2a^2) - 9

6. Finally, simplify the expression: -9

So, the simplified expression is -9.