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2. 3/4 . 3/2x = 9/8x
3. 4/x - 6/x = - 2/x
4. 3x/2 . 2/3 = x
1) 3x² + 14x + 15 = 3x² + 9x + 5x + 15
= (3x² + 9x) + (5x + 15)
= 3x(x + 3) + 5(x + 3)
= (3x + 5)(x + 3)
2) 3/4 : 2x/3 = 3/4 x 3/2x
= 9/8x
3) 4/(x-2) x 3/x = 12/x² - 2x
4) 3x/2 x 4/6 = 12x/12 = x
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