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Cum se descompune expresia x^2-10x+2

Răspuns :

x²-10x+2=0
a=1
b=-10
c=2
Δ=b²-4ac=100-8=92
x₁=(10+√92)/2=(10+2√23)/2=5+2√23
x₂=(10-√92)/2=(10-2√23)/2=5-2√23

x²-10x+2=(x-5-2√23)(x-5+2√23)