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Δ=49-24=25
√Δ=5
x1=(7-5)/4=1/2
x2=(7+5)/4=3
w(x)=2x(x-1/2)(x-3)
b)w(x)=x(3x^2-x-2)
Δ=1+24=25
√Δ=5
x1=(1-5)/6=-2/3
x2=(1+5)/6=1
w(x)=3x(x+2/3)(x-1)