-3x+12-9x+8=-3x(4x+7)

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Solution for -3x+12-9x+8=-3x(4x+7) equation: 



-3x+12-9x+8=-3x(4x+7)

We move all terms to the left:

-3x+12-9x+8-(-3x(4x+7))=0

We add all the numbers together, and all the variables

-12x-(-3x(4x+7))+20=0



We calculate terms in parentheses: -(-3x(4x+7)), so:

-3x(4x+7)

We multiply parentheses

-12x^2-21x

Back to the equation:

-(-12x^2-21x)



We get rid of parentheses

12x^2+21x-12x+20=0

We add all the numbers together, and all the variables

12x^2+9x+20=0

a = 12; b = 9; c = +20;
Δ = b2-4ac
Δ = 92-4·12·20
Δ = -879
Delta is less than zero, so there is no solution for the equation

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