Mathematics
Use direct method to evaluate the following product:
(a - 8) (a + 2)
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Answer
(a - 8) (a + 2)
Using the formula,
(x - a)(x + b) = x2 - (a - b)x - ab
= a2 - (8 - 2)a - 8 2
= a2 - 6a - 16
Hence, (a - 8) (a + 2) = a2 - 6a - 16
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