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-2x(3x-10)+8x=7x+20+7x
We move all terms to the left:
-2x(3x-10)+8x-(7x+20+7x)=0
We add all the numbers together, and all the variables
-2x(3x-10)+8x-(14x+20)=0
We add all the numbers together, and all the variables
8x-2x(3x-10)-(14x+20)=0
We multiply parentheses
-6x^2+8x+20x-(14x+20)=0
We get rid of parentheses
-6x^2+8x+20x-14x-20=0
We add all the numbers together, and all the variables
-6x^2+14x-20=0
a = -6; b = 14; c = -20;
Δ = b2-4ac
Δ = 142-4·(-6)·(-20)
Δ = -284
Delta is less than zero, so there is no solution for the equation
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