14=-5x(4x+3)+21x

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Solution for 14=-5x(4x+3)+21x equation: 



14=-5x(4x+3)+21x

We move all terms to the left:

14-(-5x(4x+3)+21x)=0



We calculate terms in parentheses: -(-5x(4x+3)+21x), so:

-5x(4x+3)+21x

We add all the numbers together, and all the variables

21x-5x(4x+3)

We multiply parentheses

-20x^2+21x-15x

We add all the numbers together, and all the variables

-20x^2+6x

Back to the equation:

-(-20x^2+6x)



We get rid of parentheses

20x^2-6x+14=0

a = 20; b = -6; c = +14;
Δ = b2-4ac
Δ = -62-4·20·14
Δ = -1084
Delta is less than zero, so there is no solution for the equation

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