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User Shijil Narayanan
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1 Answer

11 votes

Answer:

x +3

Explanation:

You can solve this by factoring.

The numbers have to add to 10 and multiply to 21.

The first numbers that should come to mind are 7 and 3

(x+3)(x+7)

x+3 is the shorter side and there you go :)

User Lee Greco
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