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- billrussell42Lv 73 years ago
multiply by 2x(x²+1) over itself
2x + 12(x²+1) + 2x(x²+1) – 8x²
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x²(x²+1) + 2x(x²+1) + (x²+1)
2x + 12(x²+1) + 2x(x²+1) – 8x²
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(x²+1)(x²+2x+1)
2x + 12x² + 12 + 2x³ + 2x – 8x²
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(x²+1)(x²+2x+1)
2x³ + 4x² + 4x + 12
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(x+1)²(x²+1)
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