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a fost răspuns

rezolvatu ecuatia xpatrat plus x-6egal 0

Răspuns :


xpatrat+x-2-4=0

(x-2)(x+2)+(x-2)=0

(x-2)(x+2+1)=0

(x-2)(x+3)=0

x-2=0=>x=2

x+3=0=>x=-3

Lovatic
x^2+x-6=0
delta=b^2-4ac=1-4(-6)=25
x1=(-b+radical din delta)/2a=-1+5/2=4/2=2
x2=-1-5/2=-6/2=-3
=>S: {2,-3}

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