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Plzzzz help me ppl maths

Plzzzz help me ppl maths-example-1

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(m + 7)(m + 3) \\ m(m + 3) + 7(m + 3) \\ m {}^(2) + 3m + 7m + 21 \\ m {}^(2) + 10m + 21

User Alextrastero
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