Question

-2,5(10a-1)+3,8(5a-3)​

Answer 1

Пошаговое объяснение:

-2,5(10a-1)+3,8(5a-3) = -25a+2.5+19a-11.4 = -6a-8.9

Answer 2

To simplify the expression -2.5(10a - 1) + 3.8(5a - 3), you can distribute the constants -2.5 and 3.8 into the parentheses and then combine like terms. Here's how you can do it step by step:

1. Distribute -2.5 into the first set of parentheses: -2.5 * 10a + 2.5 * 1 = -25a + 2.5

2. Distribute 3.8 into the second set of parentheses: 3.8 * 5a - 3.8 * 3 = 19a - 11.4

Now, you have: -25a + 2.5 + 19a - 11.4

3. Combine like terms (combine the 'a' terms and the constant terms): (-25a + 19a) + (2.5 - 11.4) = -6a - 8.9

So, the simplified expression is: -6a - 8.9