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Simplify the followingi. (2x + 1) (3x + 4) (4x + 3) (3x + 4)ii. (3x + 4)2 – (2x – 1) (3x + 4) |
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Answer» i. (2x + 1) (3x + 4) (4x + 3) (3x + 4) = (3x + 4) [(2x + 1 + 4x + 3)] = (3x + 4) [6x + 4] = (3x x (6x) + (3x) x (4)+ 4x(6x) + 4 x 4 = 18x2 + 12x + 24x + 16 = 18x2 + 36x + 16 ii. (3x + 4)2 – (2x – 1) (3x + 4) = (3x + 4) [3x + 4 – (2x – 1)] = (3x + 4)[3x + 4 – 2x + 1] = (3x + 4) (x + 5) = 3x2 + 15x + 4x + 20 = 3x2 + 19x + 20 |
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