Question

Scrie multimea sotutiilor ecuatiei : 2x²+5=-3

Answer 1

[tex]2x^2+5=-3\\ 2x^2=-3-5\\ 2x^2=-8\\ x^2=-4\\ (aici~cred~ca~este~o~greseala~sau~apartine*multimii~vide*)\\ 2x^2-5=3\\ 2x^2=3+5\\ 2x^2=8\\ x^2=8:2\\ x^2=4=\ \textgreater \ x= \left \{ {{x=-2} \atop {x=+2}} \right. [/tex]