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3x² + 9x + 5x + 15
3x (x + ) + 5 ( x + 3)
(x + 3)(3x + 5)
B. 8x²+2x-3
8x² - 4x + 6x - 3x
4x (2x - 1) + 3(2x - 1)
(2x - 1)(4x + 3)