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-928=9x+18x(7+9x)
We move all terms to the left:
-928-(9x+18x(7+9x))=0
We add all the numbers together, and all the variables
-(9x+18x(9x+7))-928=0
We calculate terms in parentheses: -(9x+18x(9x+7)), so:We get rid of parentheses
9x+18x(9x+7)
We multiply parentheses
162x^2+9x+126x
We add all the numbers together, and all the variables
162x^2+135x
Back to the equation:
-(162x^2+135x)
-162x^2-135x-928=0
a = -162; b = -135; c = -928;
Δ = b2-4ac
Δ = -1352-4·(-162)·(-928)
Δ = -583119
Delta is less than zero, so there is no solution for the equation
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