(4x + 4)(x + 1) or 4(x + 1)2
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4x2 + 8x + 4 = 4 (x2 + 2x + 1) = 4 (x + 1)2
4(x^2 + 2x + 8)
4x2 + 8x + 4 = 4 (x2 + 2x + 1) = 4 (x + 1)2
4(x^2 + 2x - 5)
5x2-2x+16=4x2+6x ,or x2-8x+16=0, or x2-2(x)(4)+(4)2=0, or (x-4)2=0, or (x-4)(x-4)=0, or x=4