(1-x)*(-2-x)+12=0

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Solution for (1-x)*(-2-x)+12=0 equation: 



(1-x)(-2-x)+12=0

We add all the numbers together, and all the variables

(-1x+1)(-1x-2)+12=0

We multiply parentheses ..

(+x^2+2x-1x-2)+12=0

We get rid of parentheses

x^2+2x-1x-2+12=0

We add all the numbers together, and all the variables

x^2+x+10=0

a = 1; b = 1; c = +10;
Δ = b2-4ac
Δ = 12-4·1·10
Δ = -39
Delta is less than zero, so there is no solution for the equation

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