Question

(x+2)^2 -49=0
Решите уравнение 

Answer 1

(x+2)^2 -49=0
(x+2+7)(x+2-7)=0
(x+9)(x-5)=0
x=-9
x=5

Answer 2

х^2+4х+4-49=0
х^2+4х-45=0

Answer 3

Д=16-4*1*(-45)=196,√Д=14

Answer 4

х1=-4+14/2=5

Answer 5

х2=-4-14/2=-9