Question

(-x-5)² + (x-4) (-X - 4) + (1 - 3)(x + 7) ​

Answer 1

Ответ:

8X+27

Пошаговое объяснение:

x2+10x+25+(-4+x)×(-4-x)-2 (x+7)

2x+10x+25+16-x2-2x-14

ответ:8Х+27

Answer 2

Let's simplify the given expression step by step:

(-x - 5)² + (x - 4)(-x - 4) + (1 - 3)(x + 7)

First, let's square the first term, (-x - 5)²:

(-x - 5)² = (-x - 5)(-x - 5) = x² + 10x + 25 (using the FOIL method)

Now, let's multiply the second and third terms separately:

(x - 4)(-x - 4) = -x² - 4x + 4x + 16 (again using the FOIL method) = -x² + 16

(1 - 3)(x + 7) = -2(x + 7)

Now, we can put all the simplified terms together:

x² + 10x + 25 + (-x² + 16) - 2(x + 7)

Now, we'll distribute the -2 inside the last term:

x² + 10x + 25 - x² + 16 - 2x - 14

Now, let's combine like terms:

(x² - x²) + 10x - 2x + 25 + 16 - 14

The x² terms cancel each other out, and we can combine the x and constant terms:

8x + 27 - 14

Now, subtract 14 from 27:

8x + 13

So, the simplified expression is 8x + 13.