Hi,

Solving equation by factoring

(x + 8)(x - 4) = -20 

x^2 +4x -32 = -20

x^2 + 4x -12 = 0

(x+6)(x-2) = 0 Note:SUM of the inner product(6x) and the outer product(-2x) = 4x

(x+6)=0

x = -6

(x-2) = 0 

x = 2 

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