Question

Am nevoie urgent de rezolvare va rog

Answer 1

Răspuns:

$5^{n^{2}+2n }=125\\5^{3}=125\\3=n^{2} +2n\\n^{2} +2n-3=0$

Δ=b²-4ac=4+12=16

n1=-b-√Δ/2a=-2-4/2=-6/2=-3/2

n2=-b+√Δ/2a=-2+4/2=2/2=1

⇒n∈{-3/2;1}

In a doua poza nu se vad bine cerintele!

Succes!:)))))