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4x³-100x=4x(x²-25)=4x((x+5)(x-5)
b]
-3x³+5x²+2x=-x(3x²-5x-2)=-x[ x-(5-√73) /6] [ x+(5+√73)/6] bo
Δ=25+48=73 x1=[5-√73]/6 x2=[5+√73]/6
c]
8x³+1=(2x+1)(4x²-2x+1)
d]
x²-2=(x+√2)(x-√2)