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0=(7x^2+18x+40)
We move all terms to the left:
0-((7x^2+18x+40))=0
We add all the numbers together, and all the variables
-((7x^2+18x+40))=0
We calculate terms in parentheses: -((7x^2+18x+40)), so:We get rid of parentheses
(7x^2+18x+40)
We get rid of parentheses
7x^2+18x+40
Back to the equation:
-(7x^2+18x+40)
-7x^2-18x-40=0
a = -7; b = -18; c = -40;
Δ = b2-4ac
Δ = -182-4·(-7)·(-40)
Δ = -796
Delta is less than zero, so there is no solution for the equation
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