Question

Х-y=4, y-z=3, xy-xz+yz-y²-?​

Answer 1

Ответ:

4-3+3•4-4²=8²=64

В лучший ответ!!!

Answer 2

To find the value of "xy - xz + yz - y² - ?", we need to solve the system of equations:

1. x - y = 4
2. y - z = 3

Let's solve this system step by step:

From equation 1), we can isolate x: x = y + 4

Now substitute this expression for x in equation 2): y - z = 3 (y + 4) - z = 3 y + 4 - z = 3 y - z = -1 (subtract 4 from both sides)

Now we have a new equation:

3. y - z = -1

Let's solve equations 2) and 3) simultaneously:

y - z = -1 (equation 3) y - z = 3 (equation 2)

Since these equations are inconsistent (they contradict each other), there is no solution that satisfies all three equations. Therefore, we cannot determine the value of "xy - xz + yz - y² - ?" with the given information.