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Dumitraselena
a fost răspuns

3x patrat - 8x = 0
x la cub -2= x la cub -2

Răspuns :

3x²-8x=0
Δ=b²-4ac=(-8)²-4×3×0=64
x'=-b+√Δ/2a=8+√64/6=8+8/6=16/6=8/3
x''=-b-√Δ/2a=8-√64/6=8-8/6=0

x³-2=x³-2
x(x²-2)=x(x²-2)
x=0
x²-2=0
x²=2
x=√2