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AndreeaAlle
a fost răspuns

Rezolvati ecuatia: x(x-1)-2x=3(x-5\3) ,x apartine R.

Răspuns :

Buzdugannatali
x(x-1) -2x = 3(x-5/3) ⇒x²-x-2x=3x-15/3⇒x²-3x-3x+5=0⇒x²-6x+5=0
x²-6x+5=0
Δ=b²-4ac=36-20=16
x₁=-b-√Δ/2a=6-4/2=1
x₂=-b+√Δ/2a=6+4/2=5
S=(1,5)

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