Question 888748
x^2+8x=14
(8/2)^2 = 4^2 = 16
so
add 16 to each side
x^2+8x+16=30
(x+4)(x+4) = 30
(x+4)^2 = 30
take square root of each side
 {{{x + 4 = sqrt(30)}}}
or
 {{{x + 4 = -sqrt(30)}}}
so 
 {{{x = -4 + sqrt(30)}}}
or
 {{{x = -4 -sqrt(30)}}}