Description

Show a box with 4 cells. Top: product (e.g., 12). Bottom: sum (e.g., 7). 'Find two numbers that multiply to 12 AND add to 7.' Answer: 3 and 4. Do 6 puzzles. These are the EXACT pairs needed for factoring trinomials! If you can find the pair, you can factor. Products range from -20 to 20, sums from -

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