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"1.9a(-7a)(-2a) 2.5y(3y³-6xy) 3.3a²b(-15ab²+12ab) 4.6x(x²-3x+8) 5.(m-3)(m²r3m-9)"

"1.9a(-7a)(-2a) 2.5y(3y³-6xy) 3.3a²b(-15ab²+12ab) 4.6x(x²-3x+8) 5.(m-3)(m²r3m-9)"
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Guest [Entry]

"1. 9a(-7a)(-8a) = 126a³

2. 5y(3y³ - 6xy) = 5y(3y³) - 5y(6xy) = 15y⁴ - 30xy²

3. 3a²b(-15ab² + 12ab) = 3a²b(-15ab²) + 3a²b(12ab) = -45a³b³ + 36a³b²

4. 6x(x² - 3x + 8) = 6x(x²) + 6x(-3x) + 6x(8) = 6x³ - 18x² + 48x

5. (m-3)(m² + 3m - 9) = m(m²) + m(3m) + m(-9) - 3(m²) - 3(3m) - 3(-9) = m³ + 3m² - 9m - 3m² - 9m + 27 = m³ + 3m² - 3m² - 9m - 9m + 27 = m³ - 18m + 27"