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Answering Eight Questions in Mathematics Education Edition
1. Square difference formula, original formula = a 2-9a 22. Original formula =-9x+6ax- 12+8a.

3. The original formula = (50+1) * (50-1) = 50 2-12 = 2500-1= 2499.

4. The original formula = (9x2-16) * (6x2-4x+9x-6) = 54x4+45x3-150x2-80x+96.

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