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Question
Expand.
(m − 4)(m + 6)
Sum
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Solution 1
(m − 4)(m + 6)
= (m)2 + {(−4) + 6}m + (−4) × (6)
= m2 + (−4 + 6)m − 24
= m2 + 2m − 24
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Solution 2
(m − 4)(m + 6)
= m(m + 6) − 4(m + 6)
= m2 + 6m − 4m − 24
= m2 + 2m − 24
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