Respuesta :

carlosego
√x^2+2x-10=√x+20
 raising both members to the square
 x^2+2x-10=x+20
 rewriting
 x^2+x-30=0
 factoring
 (x+6)(x-5)=0
 therefore the solutions are
 x = –6, x = 5
the answer is 
B. x = –6, x = 5