Question

1)(8 + 3x)(7x + 1); 2) (5a + bc)(c-9a);3) (2x - 5x²)(4- 7x);4) (6 +b)?;5) (12m-n) (4m² - 3mn +5m²)​

Answer 1

Ответ:

ответ и решение на листочке

Answer 2

Let's expand each of the given expressions:

1. (8 + 3x)(7x + 1) Expanding using the distributive property: = 8 * (7x + 1) + 3x * (7x + 1) = 56x + 8 + 21x² + 3x = 21x² + 59x + 8

2. (5a + bc)(c - 9a) Expanding using the distributive property: = 5a * (c - 9a) + bc * (c - 9a) = 5ac - 45a² + bcc - 9abc = -45a² + (5ac - 9abc) + bcc

3. (2x - 5x²)(4 - 7x) Expanding using the distributive property: = 2x * (4 - 7x) - 5x² * (4 - 7x) = 8x - 14x² - 20x² + 35x³ = -34x² + 8x + 35x³

4. (6 + b)? There seems to be a missing factor or term in this expression. Could you provide the missing information?

5. (12m - n)(4m² - 3mn + 5m²) Expanding using the distributive property: = 12m * (4m² - 3mn + 5m²) - n * (4m² - 3mn + 5m²) = 48m³ - 36m²n + 60m³ - 12mn - 20m²n + 15mn - 40m² + 3mn - 5m² = 108m³ - 56m²n + 4mn - 45m²

Note: Please double-check the expressions, especially for the missing information in the fourth expression, to ensure accuracy in the final answers.