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Theodoramadalina
a fost răspuns

x² + x = 6 , x ∈ R Urgent!!!

Răspuns :

x`2+x =6
6€{0+6;1+5;2+4;3+3}
x=2
Nitugheorghe57
x²+x=6⇒x²+x-6=0⇒
a=1
b=1
c=-6
Δ=b²-4ac⇒Δ=1+24⇒Δ=25⇒√Δ=√25⇒Δ=5
x1x2=-b+-√Δ/2a⇒
x1=-1+5/2⇒4/2⇒x1=2
x2=-1-5/2⇒-6/2⇒x2=-3
sucees

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