Question

1. Expand (m + 5) (m - 7).​

Answer 1

$(m + 5) (m - 7)$

$= m (m - 7) + 5(m - 7)$

$= {m}^{2} - 7 m+ 5m - 35$

$= {m}^{2} - 2m - 35$

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