oblicz : 9x^3+30x^2+25x=0
9x^3+30x^2+25x=0
x(9x^2+30x+25)=0
x=0 lub Δ=b²-4ac=900-900=0
x=-30/18=-5/3
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9x^3+30x^2+25x=0
x(9x^2+30x+25)=0
x=0 lub Δ=b²-4ac=900-900=0
x=-30/18=-5/3