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Question
Use the formula to multiply:
(6) (m + 5) (m – 6)
(6) (m + 5) (m – 6)
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Solution
As (x + a) (x + b) = x2 + (a + b)x + ab
So, (m + 5) (m – 6) = m2 + [5 + (–6)]m – 30
= m2 – m – 30
∴ (m + 5) (m – 6) = m2 – m – 30
So, (m + 5) (m – 6) = m2 + [5 + (–6)]m – 30
= m2 – m – 30
∴ (m + 5) (m – 6) = m2 – m – 30
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