bjr
3x (5x - 1) - (2x +2)
= 3x*5x + 3x*(-1) - 2x - 2
= 15x² - 3x - 2x - 2
= 15x² - 5x - 2
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bjr
3x (5x - 1) - (2x +2)
= 3x*5x + 3x*(-1) - 2x - 2
= 15x² - 3x - 2x - 2
= 15x² - 5x - 2