Odpowiedź:
1. (3x - 5y) (-3x + 2y) + (3x - 5y) (4x + 3y) = -9x² + 6xy + 15xy - 10y² + 12x² + 9xy - 20xy - 15y² = 3x² - 25y² + 10xy
2. (-2a + 3b) (x - y) - ( - 2a + 3b) (-2x + 5y) = -2ax + 2ay + 3bx - 3by - 4ax - 10 ay - 6bx + 15by = -6ax - 8ay - 3bx + 12by
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Odpowiedź:
1. (3x - 5y) (-3x + 2y) + (3x - 5y) (4x + 3y) = -9x² + 6xy + 15xy - 10y² + 12x² + 9xy - 20xy - 15y² = 3x² - 25y² + 10xy
2. (-2a + 3b) (x - y) - ( - 2a + 3b) (-2x + 5y) = -2ax + 2ay + 3bx - 3by - 4ax - 10 ay - 6bx + 15by = -6ax - 8ay - 3bx + 12by