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1. |
Find the product: (a – b) (2a + 4b) |
Answer» (a – b) (2a + 4b) = a(2a + 4b) – b(2a + 4b) = (a × 2a + a × 4b) – (b × 2a + b × 4b) = 2a2 + 4ab – (2ab + 4b2) = 2a2 + 4ab – 2ab – 4b2 = 2a2 + 2ab – 4b2 |
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