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Question
Expand using the formula:
(x − 5) (x + 6)
Sum
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Solution
(x − 5)(x + 6)
= x(x + 6) − 5(x + 6)
= (x × x) + (x × 6) − (5 × x) + (5 × 6)
= x2 + 6x − 5x − 30
∴ (x − 5) (x + 6) = x2 + x − 30
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