-5x(-x-3)-7x=-9

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Solution for -5x(-x-3)-7x=-9 equation: 



-5x(-x-3)-7x=-9

We move all terms to the left:

-5x(-x-3)-7x-(-9)=0

We add all the numbers together, and all the variables

-5x(-1x-3)-7x-(-9)=0

We add all the numbers together, and all the variables

-7x-5x(-1x-3)+9=0

We multiply parentheses

5x^2-7x+15x+9=0

We add all the numbers together, and all the variables

5x^2+8x+9=0

a = 5; b = 8; c = +9;
Δ = b2-4ac
Δ = 82-4·5·9
Δ = -116
Delta is less than zero, so there is no solution for the equation

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