Rozłóż wielomian W(x)=-2x3-x2+x na czynniki stopnia najniższego
2x[3]-x[2]+x=-x(2x[2]+x-1)=-2x(x+1)(x-1/2)=-x(x+1)(2x-1)
a=2
b=1
c=-1
x₁=[-b-√Δ]:2a=-1-3:4=-1
x₂=[-b+√Δ]:2a=-1+3:4=½
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2x[3]-x[2]+x=-x(2x[2]+x-1)=-2x(x+1)(x-1/2)=-x(x+1)(2x-1)
a=2
b=1
c=-1
x₁=[-b-√Δ]:2a=-1-3:4=-1
x₂=[-b+√Δ]:2a=-1+3:4=½