X(x-4)=-20

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Solution for X(x-4)=-20 equation: 



X(X-4)=-20

We move all terms to the left:

X(X-4)-(-20)=0

We add all the numbers together, and all the variables

X(X-4)+20=0

We multiply parentheses

X^2-4X+20=0

a = 1; b = -4; c = +20;
Δ = b2-4ac
Δ = -42-4·1·20
Δ = -64
Delta is less than zero, so there is no solution for the equation

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