5x-7x+9=-2x(x+4)

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Solution for 5x-7x+9=-2x(x+4) equation: 



5x-7x+9=-2x(x+4)

We move all terms to the left:

5x-7x+9-(-2x(x+4))=0

We add all the numbers together, and all the variables

-2x-(-2x(x+4))+9=0



We calculate terms in parentheses: -(-2x(x+4)), so:

-2x(x+4)

We multiply parentheses

-2x^2-8x

Back to the equation:

-(-2x^2-8x)



We get rid of parentheses

2x^2+8x-2x+9=0

We add all the numbers together, and all the variables

2x^2+6x+9=0

a = 2; b = 6; c = +9;
Δ = b2-4ac
Δ = 62-4·2·9
Δ = -36
Delta is less than zero, so there is no solution for the equation

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