Question

Упростите выражение.

Answer 1

Если что то не понятно спрашивай!!!!

Answer 2

1) (x+2) * (x-5) - 3x * (1-2x) = x² - 5x + 2x - 10 - 3x + 6x² = 7x² - 6x - 10

2) (a+3) * (a-2) + (a-3) * (a+6) = a² - 2a + 3a - 6 + a² + 6a - 3a - 18 = 2a² + 4a - 24

3) (x-7) * (3x-2) - (5x+1) * (2x-4) = 3x² - 2x - 21x + 14 - (10x² - 20x + 2x - 4) = 3x² - 2x - 21x + 14 - (10x² - 18x - 4) = 3x² - 2x - 21x + 14 - 10x² + 18x + 4 = -7x² - 5x + 18

4) (5x-2y) * (3x+5y) - (2,5x - 3y) * (4x + 8y) = 15x² + 25xy - 6xy - 10y² - (10x² + 20xy - 12xy - 24y²) = 15x² + 25xy - 6xy - 10y² - (10x² + 8xy - 24y²) = 15x² + 25xy - 6xy - 10y² - 10x² - 8xy + 24y² = 5x² + 11xy + 14y²

5) (3a² + 5y) * (2a³ + y) - 7a³ * (a² - 3y) = 6a⁵ + 3a²y + 10a³y + 5y² - 7a⁵ + 21a³y = -a⁵ + 3a²y + 31a³y + 5y².