20=-0.01x^2+0.4x+6.1

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Solution for 20=-0.01x^2+0.4x+6.1 equation: 



20=-0.01x^2+0.4x+6.1

We move all terms to the left:

20-(-0.01x^2+0.4x+6.1)=0

We get rid of parentheses

0.01x^2-0.4x-6.1+20=0

We add all the numbers together, and all the variables

0.01x^2-0.4x+13.9=0

a = 0.01; b = -0.4; c = +13.9;
Δ = b2-4ac
Δ = -0.42-4·0.01·13.9
Δ = -0.396
Delta is less than zero, so there is no solution for the equation

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