Question

1) 5(2x-3)2)-(6x+8)+6x3)5-(2x-20) ​

Answer 1

1)10х-15
Х=-10+15
Х=5
2)-6х-8+6х
Сокращаем
Остаётся 8
3)5-2х+20
-2х=-25
Х=12,5

Answer 2

It seems like you have a mathematical expression that needs simplification. Let's break it down step by step and simplify it:

1. Distribute the 5 to both terms inside the first parentheses: 5(2x - 3)^2 - (6x + 8) + 6x(3)5 - (2x - 20)

2. Expand the square inside the first parentheses (2x - 3)^2: 5(4x^2 - 12x + 9) - (6x + 8) + 6x(3)5 - (2x - 20)

3. Distribute the 5 inside the first parentheses: 20x^2 - 60x + 45 - (6x + 8) + 6x(3)5 - (2x - 20)

4. Multiply 6x by 15: 20x^2 - 60x + 45 - 6x - 8 + 90x - (2x - 20)

5. Combine like terms: 20x^2 - 60x + 45 - 6x - 8 + 90x - 2x + 20

6. Combine the x-terms: 20x^2 - 60x - 6x + 90x - 2x

7. Combine the constants: 20x^2 + (90 - 60 - 6 - 2)x + (45 - 8 + 20)

8. Perform the arithmetic operations: 20x^2 + 22x + 57

So, the simplified expression is: 20x^2 + 22x + 57