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Find the following products : (x + 7) (x - 2) |
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Answer» Using the identity : (x + a) (x + b) = x2 + (a + b) x + ab, we have (x + 7) (x - 2) = (x + 7) (x + (-2)) = x2 + 7x + (-2)x + 7 × (-2) = x2 + 5x - 14 |
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