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35-30x(-7-14x)=0
We add all the numbers together, and all the variables
-30x(-14x-7)+35=0
We multiply parentheses
420x^2+210x+35=0
a = 420; b = 210; c = +35;
Δ = b2-4ac
Δ = 2102-4·420·35
Δ = -14700
Delta is less than zero, so there is no solution for the equation
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