Hi,        

Solving the equation

x^2 + 18x + 81 = 25

x^2 + 18x + 56 = 0

factoring

(x+14)(x+4)= 0 Note:SUM of the inner product(14*x) and the outer product(4x) =18

(x+14)=0   x = -14

(x+4)= 0   x = -4

If factoring does not occur to You, Quadratic formula always an alternative



x = -28/2 = -14  

or x = -8/2 = -4 }}} 

Answer by scott8148(6628)   (Show Source): You can put this solution on YOUR website!
 both sides of the equation are perfect squares ___ (x + 9)^2 = 25





taking square root (remember plus/minus roots) ___ x + 9 = ±5





x = -9 ± 5





x = -4 ___ AND ___ x = -14 

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