(х+4)во 2 степени=х(х+3)

Question

(х+4)во 2 степени=х(х+3)

Answer 1

( x + 4 )^2 = x( x + 3 ) 
x^2 + 8x + 16 = x^2 + 3x 
8x + 16 = 3x 
5x = - 16 
x = - 3,2