2x(-x)=20

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Solution for 2x(-x)=20 equation: 



2x(-x)=20

We move all terms to the left:

2x(-x)-(20)=0

We add all the numbers together, and all the variables

2x(-1x)-20=0

We multiply parentheses

-2x^2-20=0

a = -2; b = 0; c = -20;
Δ = b2-4ac
Δ = 02-4·(-2)·(-20)
Δ = -160
Delta is less than zero, so there is no solution for the equation

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