120=20x-x2

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Solution for 120=20x-x2 equation: 



120=20x-x2

We move all terms to the left:

120-(20x-x2)=0

We add all the numbers together, and all the variables

-(+20x-1x^2)+120=0

We get rid of parentheses

1x^2-20x+120=0

We add all the numbers together, and all the variables

x^2-20x+120=0

a = 1; b = -20; c = +120;
Δ = b2-4ac
Δ = -202-4·1·120
Δ = -80
Delta is less than zero, so there is no solution for the equation

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