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0=3x^2+33x+54
We move all terms to the left:
0-(3x^2+33x+54)=0
We add all the numbers together, and all the variables
-(3x^2+33x+54)=0
We get rid of parentheses
-3x^2-33x-54=0
a = -3; b = -33; c = -54;
Δ = b2-4ac
Δ = -332-4·(-3)·(-54)
Δ = 441
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{441}=21$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-33)-21}{2*-3}=\frac{12}{-6} =-2 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-33)+21}{2*-3}=\frac{54}{-6} =-9 $
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