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(x-4)(7/10)=-42
We move all terms to the left:
(x-4)(7/10)-(-42)=0
We add all the numbers together, and all the variables
(x-4)(+7/10)-(-42)=0
We add all the numbers together, and all the variables
(x-4)(+7/10)+42=0
We multiply parentheses ..
(+7x^2-4*7/10)+42=0
We multiply all the terms by the denominator
(+7x^2-4*7+42*10)=0
We get rid of parentheses
7x^2-4*7+42*10=0
We add all the numbers together, and all the variables
7x^2+392=0
a = 7; b = 0; c = +392;
Δ = b2-4ac
Δ = 02-4·7·392
Δ = -10976
Delta is less than zero, so there is no solution for the equation
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