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-5
4x2 + 12x + 5 = 4x2 + 2x + 10x + 5 = 2x(2x+1) + 5(2x+1) = (2x+1)(2x+5)
10x - 5 = 2510x = 30x = 3
24
5x + 4 = 10x - 5 10x - 5x = 4 + 5 5x = 9 x = 1.8