Question

(x-2)²-(x-1)(x+2) ........

Answer 1

Ответ:

х²-4х+4-(х²-х+2х-2)=х²-4х+4-х²+х-2х+2=-5х+6

Answer 2

Ответ:

6-5х

Пошаговое объяснение:

х²-4х+4-(х²+2х-х-2)=х²-4х+4-(х²+х-2)= х²-4х+4-х²-х+2=-5х+6= 6-5х

Answer 3

To simplify the expression (x - 2)² - (x - 1)(x + 2), you can follow these steps:

1. Expand the square: (x - 2)² = (x - 2)(x - 2) = x² - 4x + 4

2. Expand the product (x - 1)(x + 2): (x - 1)(x + 2) = x(x) + x(2) - 1(x) - 1(2) = x² + 2x - x - 2 = x² + x - 2

Now, you can subtract the second expression from the first:

(x - 2)² - (x - 1)(x + 2) = (x² - 4x + 4) - (x² + x - 2)

Now, distribute the negative sign to each term inside the parentheses:

x² - 4x + 4 - x² - x + 2

Next, simplify the expression by combining like terms:

(x² - x²) + (-4x - x) + (4 + 2) = 0x - 5x + 6 = -5x + 6

So, the simplified expression is -5x + 6.