x(x+7)=3x-9

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



x(x+7)=3x-9

We move all terms to the left:

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

We multiply parentheses

x^2+7x-(3x-9)=0

We get rid of parentheses

x^2+7x-3x+9=0

We add all the numbers together, and all the variables

x^2+4x+9=0

a = 1; b = 4; c = +9;
Δ = b2-4ac
Δ = 42-4·1·9
Δ = -20
Delta is less than zero, so there is no solution for the equation

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