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Find the following products:(i) (x – 3) (x – 2)(ii) (y2 – 4) (y2 – 3)(iii) (x + 4/3) (x + 3/4) |
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Answer» (i) (x – 3) (x – 2) = x (x – 2) – 3 (x – 2) = x2 – 2x – 3x + 6 = x2 – 5x + 6 (ii) (y2 – 4) (y2 – 3) = y2 (y2 – 3) – 4 (y2 – 3) = y4 – 3y2 – 4y2 + 12 = y4 – 7y2 + 12 (iii) (x + 4/3) (x + 3/4) = x (x + 3/4) + 4/3 (x + 3/4) = x2 + 3x/4 + 4x/3 + 12/12 = x2 + 3x/4 + 4x/3 + 1 = x2 + 25x/12 + 1 |
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