78=(x^2-x)/2

Solution for 78=(x^2-x)/2 equation:

78=(x^2-x)/2

We move all terms to the left:

78-((x^2-x)/2)=0

We multiply all the terms by the denominator


-((x^2-x)+78*2)=0


We calculate terms in parentheses: -((x^2-x)+78*2), so:

(x^2-x)+78*2

We add all the numbers together, and all the variables

(x^2-x)+156

We get rid of parentheses

x^2-x+156

We add all the numbers together, and all the variables

x^2-1x+156

Back to the equation:

-(x^2-1x+156)


We get rid of parentheses

-x^2+1x-156=0

We add all the numbers together, and all the variables

-1x^2+x-156=0

a = -1; b = 1; c = -156;
Δ = b2-4ac
Δ = 12-4·(-1)·(-156)
Δ = -623
Delta is less than zero, so there is no solution for the equation