Question

Раскройте скобки: 4(5m-3n); -7(6a-4b); 9(3x-2y).

Answer 1

Ответ:

Пошаговое объяснение:

4(5m-3n)=20m-12n

-7(6a-4b)=-42a+28b

9(3x-2y)=27x-18y

Answer 2

4(5m-3n)=20m-12n

-7(6a-4b)=-42a+28b

9(3x-2y)=27x-18y

Answer 3

To expand the expressions within the parentheses, you need to apply the distributive property. The distributive property states that for any numbers a, b, and c:

a(b + c) = ab + ac

Let's use this property to expand the given expressions:

1. 4(5m - 3n) = 4 * 5m + 4 * (-3n) = 20m - 12n

2. -7(6a - 4b) = -7 * 6a + (-7) * (-4b) = -42a + 28b

3. 9(3x - 2y) = 9 * 3x + 9 * (-2y) = 27x - 18y

So, after expanding the expressions, we have:

1. 4(5m - 3n) = 20m - 12n
2. -7(6a - 4b) = -42a + 28b
3. 9(3x - 2y) = 27x - 18y