Question

2,5(4a-8b)-1,4(3a-4b)​

Answer 1

Ось розв’язання:
2,5(4a-8b)-1,4(3a-4b) = 10a - 20b - 4,2a + 5,6b
= 5,8a - 14,4b
Отже, спрощений вираз дорівнює 5,8a - 14,4b.

Answer 2

To simplify the expression 2.5(4a-8b) - 1.4(3a-4b), you can use the distributive property to expand and then combine like terms. Here's how to do it step by step:

1. Start with the original expression: 2.5(4a-8b) - 1.4(3a-4b)

2. Distribute the constants (2.5 and -1.4) into the parentheses:

   (2.5 * 4a) - (2.5 * 8b) - (1.4 * 3a) + (1.4 * 4b)

3. Simplify each term:

   10a - 20b - 4.2a + 5.6b

4. Combine like terms. Group the "a" terms and the "b" terms:

   (10a - 4.2a) + (-20b + 5.6b)

5. Perform the arithmetic in each group:

   5.8a - 14.4b

So, the simplified expression is:

5.8a - 14.4b