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8x2 + 16x + 8 = 0
x=5
x= 2 because 2x+4=16 4x2=8 8+2 or 8x2=16
8x2 + 16x + 8 = 8*(x2 + 2x + 1) = 8*(x + 1)2
8x2-2x-15 = 0 (2x-3)(4x+5) = 0 x = 3/2 or x = -5/4