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1
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(2a - 3b + c).3a = | |
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2
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(-2a).(-a - b + c) = | |
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3
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3ab.(a² - b² + 2ab) = | |
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4
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(6ax²y + 2a²x - 5xy²).(-2xy) = | |
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5
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3a.(a² - 1) - 3a². (a + 1) - 3a = | |
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6
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a².(a + b) - 2b.(a² - 1) + 2 .(a² + 1) = | |
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7
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3xy.(x - y) + 2x.(2xy - 1)- y.(2x² + 1) = | |
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8
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2x.(x² - xy + y²)- 2y.(x² - y²) = | |
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9
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2a² - 3b² + (a - b).(a - 2b) - (2a - b).(a + b) = | |
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10
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(x + 1).(x - 2).(x + 3) - (x - 1).(x + 2).(x - 3) = |