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X patrat+3x+radical din x patrat +3x+5=7

Răspuns :

[tex] x^{2} +3x+ \sqrt{ x^{2} }+3x+5=7\\ x^{2} +3x+x+3x+5-7=0\\ x^{2} +7x-2=0[/tex]
[tex]\Delta=49+8=57 \\ x_{1} = \frac{-7+ \sqrt{57} }{2} \\ x_{1} = \frac{-7- \sqrt{57} }{2}[/tex]