Question

5(4x² - 2x + 1) – 2(10x2 - 6x - 1);​

Answer 1

Ответ:

5(4x2-2x+1) - 2(10x2-6x-1)=20x2-10x + 5-2Ox2 + 12x + 2-2x + 7

Answer 2

Ответ:

20x²+2x-33

Объяснение:

Раскрытие скобок:

(5×4x²-5×2x+5×1)-(2×20-2×6x-2×1)=

20x²-10x+5-40+12x+2=

20x²+2x-33.

Answer 3

To simplify the expression 5(4x² - 2x + 1) - 2(10x² - 6x - 1), you need to distribute the constants (5 and -2) to each term within the parentheses and then combine like terms. Here's how you can do it step by step:

1. Distribute 5 to each term inside the first set of parentheses: 5(4x²) - 5(2x) + 5(1) - 2(10x² - 6x - 1)

2. Distribute -2 to each term inside the second set of parentheses: 20x² - 10x + 5 - 20x² + 12x + 2

3. Now, you can combine like terms: (20x² - 20x²) + (-10x + 12x) + (5 + 2)

4. Simplify further: 0x² + 2x + 7

5. Since 0x² is just 0, the expression simplifies to: 2x + 7

So, the simplified expression is 2x + 7.