Question

31.1 7 класс 5)(a-c)³ ;6)(c-b)³ ;7)z-t)³ ;8)(k+m)³

Answer 1

5)(а³-3а²с+3ас²-с³)

6)(с³-3с²b+3cb³-b³)

7)(z³-3z²t+3zt²+t³)

8)(k³+3k²m+3km²+m³)

Объяснение:

:))

Answer 2

It seems like you have a set of expressions, and you want to simplify them. Let's simplify each of these expressions:

5. (a - c)³: To simplify this expression, you can use the formula for the difference of cubes, which is (a - b)³ = a³ - 3a²b + 3ab² - b³. In this case, a = a and b = c. So,

(a - c)³ = a³ - 3a²c + 3ac² - c³

6. (c - b)³: Using the same formula for the difference of cubes:

(c - b)³ = c³ - 3c²b + 3cb² - b³

7. (z - t)³: Again, using the same formula for the difference of cubes:

(z - t)³ = z³ - 3z²t + 3zt² - t³

8. (k + m)³: Now, we can use the formula for the sum of cubes, which is (a + b)³ = a³ + 3a²b + 3ab² + b³. In this case, a = k and b = m. So,

(k + m)³ = k³ + 3k²m + 3km² + m³

These are the simplified expressions for the given expressions.