bjr
C = 20x - 35 = 5 * 4x - 5 * 7 = 5 (4x - 7)
D = 18x + 30x² = 6x * 3 + 6x * 5x = 6x (3 + 5x)
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bjr
C = 20x - 35 = 5 * 4x - 5 * 7 = 5 (4x - 7)
D = 18x + 30x² = 6x * 3 + 6x * 5x = 6x (3 + 5x)