Question

6•(2.25а-0.9)-4.5•(1.2+3а)

Answer 1

Ответ:

Пошаговое объяснение:

13,5 а - 5,4 -5,4 - 13,5а

= 10,8

Answer 2

To simplify the expression, let's first perform the operations inside the parentheses and then combine like terms:

1. Simplify the expression inside the first set of parentheses: 2.25a - 0.9

2. Simplify the expression inside the second set of parentheses: 1.2 + 3a

Now, the expression becomes:

6 * (2.25a - 0.9) - 4.5 * (1.2 + 3a)

Next, distribute the coefficients:

6 * 2.25a - 6 * 0.9 - 4.5 * 1.2 - 4.5 * 3a

Now, multiply:

13.5a - 5.4 - 5.4 - 13.5a

Now, combine like terms:

(13.5a - 13.5a) - 5.4 - 5.4

The "13.5a - 13.5a" terms cancel out, leaving us with:

0 - 5.4 - 5.4

Finally, combine the constants:

-5.4 - 5.4 = -10.8

So the simplified expression is -10.8.