Question

(а – 2) (а + 3) – 2а (а – 4).

Answer 1

Ответ:

(а – 2) (а + 3) – 2а (а – 4)=a²+3a-2a-6-2a²+8a= -a²+9a-6

Объяснение:

вроде бы так

Answer 2

To simplify the given expression, let's follow the order of operations (PEMDAS/BODMAS):

1. Parentheses: First, we'll simplify the expressions within the parentheses.

   (а - 2) (а + 3) - 2а (а - 4)

   Expand the first set of parentheses: а * а + а * 3 - 2 * а (а - 4)

   а * а simplifies to а^2.

   а * 3 simplifies to 3а.

2. Simplify within Parentheses: Now, simplify the second set of parentheses.

   2 * а (а - 4)

   Distribute the 2 within the parentheses: 2а * а - 2 * 4

   2а * а simplifies to 2а^2.

   2 * 4 simplifies to 8.

3. Combine Terms: Now let's combine the terms we've simplified so far:

   а^2 + 3а - (2а^2 - 8)

4. Distribute Negative Sign: Distribute the negative sign through the second set of parentheses:

   а^2 + 3а - 2а^2 + 8

5. Combine Like Terms: Combine the terms with the same variable and exponent:

   (а^2 - 2а^2) + 3а + 8

   -а^2 + 3а + 8

So, the simplified expression is -а^2 + 3а + 8.