Question

(A-7)(a-7)-(2a+3)(2a+1)

Answer 1

Ответ:

ответ и решение на фото (я правильно понял, что нужно было упростить просто)

Объяснение:

Answer 2

To simplify the expression $(A-7)(a-7)-(2a+3)(2a+1)$, you can use the distributive property and then combine like terms:

$(A-7)(a-7) - (2a+3)(2a+1)$

First, let's multiply the terms within each set of parentheses:

$A(a) - A(7) - 7(a) + 7(7) - (2a(2a) + 2a(1) + 3(2a) + 3(1))$

Now, we can simplify each part separately:

$Aa - 7A - 7a + 49 - (4a^2 + 2a + 6a + 3)$

Next, combine like terms:

$(Aa - 7a) - (7A - 49) - (4a^2 + 2a + 6a + 3)$

$a(A - 7) - 7(A - 7) - (4a^2 + 8a + 3)$

Now, notice that you have a common factor in the first two terms and also in the last three terms:

$a(A - 7) - 7(A - 7) - (4a^2 + 8a + 3)$

Let's factor out these common terms:

$(A - 7)(a - 7) - (4a^2 + 8a + 3)$

Now, we can simplify further:

$(A - 7)(a - 7) - 4a^2 - 8a - 3$

So, the simplified expression is:

$(A - 7)(a - 7) - 4a^2 - 8a - 3$