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I think one or both of those have to be negative.

-3 + 7 = 4

-3 x 7 = -21

3 + -7 = -4

3 x -7 = -21

7 x 3 = 21

7 - 3 = 4

It also works if you subtract.

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12y ago
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Anonymous

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4y ago
What about add to -4 and multiply to 21

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Q: What numbers can you multiply to get 21 and add to get 4?
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