Question

7м(м2-3н)-15н(3м+н)+4м(-м+8н)

Answer 1

Ответ:

Объяснение:

если там и правда квадрат, то

7m(m²+3n) -15n(3m+n) + 4m(-m+8n) = 7m³ + 21mn - 45mn - 15n²-4m²+32mn = 7m³-4m²+8mn-15n²

Answer 2

To simplify the expression 7m(m^2 - 3n) - 15n(3m + n) + 4m(-m + 8n), you can start by distributing the coefficients and then combining like terms. Here's the step-by-step simplification:

1. Distribute the coefficients: 7m * m^2 - 7m * 3n - 15n * 3m - 15n * n + 4m * (-m) + 4m * 8n

2. Multiply the coefficients and simplify each term: 7m^3 - 21mn - 45mn - 15n^2 - 4m^2 + 32mn

3. Combine like terms: 7m^3 - 21mn - 45mn - 4m^2 + 32mn - 15n^2

4. Combine like terms involving 'm': 7m^3 - 4m^2 - 21mn + 32mn - 45mn - 15n^2

5. Combine like terms involving 'n': 7m^3 - 4m^2 - 34mn - 15n^2

So, the simplified expression is:

7m^3 - 4m^2 - 34mn - 15n^2