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5(x+2)totul la patrat =45 pleaseee

Răspuns :

5(x+2)^4=45
5x^4+40x^3+120x^2+160x+80=45
5x^4+40x^3+120x^2+160x+80−45=45−45
5x^4+40x^3+120x^2+160x+35=0
x=−3.732051,−0.267949