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x2 + 10x + 21 = (x + 3)(x + 7)

You need to find 2 numbers which sum to 10 and whose product of 21.

In this case 3 + 7 = 10 and 3 x 7 = 21.

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13y ago
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Q: What is the factorization of x2 plus 10x plus 21?
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