Question

(2-с) степень 2 -с(с+4) при с = -0,5

Answer 1

(2 - c)² - c(c + 4) = 4 - 4c + c² - c² - 4c = - 8c + 4
- 8 * (- 0,5) + 4 = 4 + 4 = 8

Answer 2

To evaluate the expression (2c)^2 - c(c + 4) when c = -0.5, follow these steps:

Step 1: Substitute the value of c into the expression. Step 2: Perform the necessary calculations.

Given c = -0.5, let's proceed with the evaluation:

Step 1: (2 * -0.5)^2 - (-0.5)(-0.5 + 4)

Step 2: (-1)^2 - (-0.5)(3.5)

Step 2 (Continued): 1 - (-1.75)

Now, to subtract a negative number, we can convert it to addition: 1 + 1.75

Step 2 (Continued): 2.75

So, when c = -0.5, the value of the expression (2c)^2 - c(c + 4) is 2.75.