W(x)=(x²+2x)²-x² = x⁴ + 4x³ + 4x² - x² = x⁴ + 4x³ + 3x² = x²(x² + 4x + 3)
Δ = 16 - 12 = 4
W(x) = x² (x+1)(x+3)
W(x)=x³+x-2
W(1)=0
(x³+x-2):(x-1) = x² + x + 2
W(x) =(x² + x + 2)(x-1)
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W(x)=(x²+2x)²-x² = x⁴ + 4x³ + 4x² - x² = x⁴ + 4x³ + 3x² = x²(x² + 4x + 3)
Δ = 16 - 12 = 4
W(x) = x² (x+1)(x+3)
W(x)=x³+x-2
W(1)=0
(x³+x-2):(x-1) = x² + x + 2
W(x) =(x² + x + 2)(x-1)