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0=(x^2+3x+9)
We move all terms to the left:
0-((x^2+3x+9))=0
We add all the numbers together, and all the variables
-((x^2+3x+9))=0
We calculate terms in parentheses: -((x^2+3x+9)), so:We get rid of parentheses
(x^2+3x+9)
We get rid of parentheses
x^2+3x+9
Back to the equation:
-(x^2+3x+9)
-x^2-3x-9=0
We add all the numbers together, and all the variables
-1x^2-3x-9=0
a = -1; b = -3; c = -9;
Δ = b2-4ac
Δ = -32-4·(-1)·(-9)
Δ = -27
Delta is less than zero, so there is no solution for the equation
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