👤

5la puterea x+2 ×2LA Puterea x+1+7×10la puterea x=57000

Răspuns :

5ˣ⁺² x 2ˣ⁺¹ +7 x 5ˣ x 2ˣ = 57000
5ˣ x 2ˣ (5² x 2¹ + 7) = 57000
10ˣ (25 x 2 +7) = 57000
10ˣ x 57 = 57000
10ˣ = 57000:57
10ˣ = 1000
10ˣ = 10³
x=3