Question

(7x-11)^3=2^5*5^2+200

Answer 1

Ta có:(7x-11)³=2⁵ * 5² + 200

     => (7x-11)³=32 * 25 + 200

     => (7x-11)³=800 + 200 

     => (7x-11)³=1000 = 10³

     => 7x-11 = 10 

     => 7x = 21

     => x = 3