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Deearadu34
a fost răspuns

2radical 1215+3radical 5 imultit (2 radical 80- radical 50

Răspuns :

Crisanemanuel
√1215=18√15;√80=4√5;√50=5√2⇒
2√1215+3√5×(2√80-√50)=2×18√15+3√5×(8√5-5√2)=36√15+3√5(8√5-5√2)=
=36√15+120+15√10
deoarece:3√5×8√5=3×8×5=120(√5×√5=5);√5×√2=√10

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