(2x-5)(x+1)=-12

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Solution for (2x-5)(x+1)=-12 equation: 



(2x-5)(x+1)=-12

We move all terms to the left:

(2x-5)(x+1)-(-12)=0

We add all the numbers together, and all the variables

(2x-5)(x+1)+12=0

We multiply parentheses ..

(+2x^2+2x-5x-5)+12=0

We get rid of parentheses

2x^2+2x-5x-5+12=0

We add all the numbers together, and all the variables

2x^2-3x+7=0

a = 2; b = -3; c = +7;
Δ = b2-4ac
Δ = -32-4·2·7
Δ = -47
Delta is less than zero, so there is no solution for the equation

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