Question

X-8/x^2:x-8/x^2+7x при x= -0,7​

Answer 1

Ответ:

Пошаговое объяснение:

x-8/x²:x-8/x²+7x=x-8/x² *x(x+7)/x-8 = x+7/x

Якщо x= -0,7​,то x+7/x= -0,7+7/ -0,7= 6,3/ -0,7= -9

Answer 2

To evaluate the expression X-8/x^2:x-8/x^2+7x at x = -0.7, we'll substitute the value of x into the expression and perform the calculations step by step.

First, let's evaluate each part of the expression separately:

1. X-8/x^2
2. x-8/x^2+7x

Step 1: Evaluate X-8/x^2 at x = -0.7

X-8/x^2 = X - 8 / (-0.7)^2 = X - 8 / 0.49

Step 2: Evaluate x-8/x^2+7x at x = -0.7

x-8/x^2+7x = -0.7 - 8 / (-0.7)^2 + 7 * (-0.7) = -0.7 - 8 / 0.49 - 4.9 = -0.7 - 16.3265306 (rounded to 7 decimal places)

Now that we have the values for both parts, we can calculate the expression:

Expression = (X-8/x^2) : (x-8/x^2+7x)

Expression = (X - 8 / 0.49) / (-0.7 - 16.3265306)

Please note that since X is a variable and its value is not provided, we cannot simplify the expression further without knowing its specific value. The result will be in terms of X.

If you have a specific value for X, you can substitute it into the expression and calculate the final result.